"You really learn from your mistakes. Never did a remodel before & had no help. You can look at a million pictures & think in your head how yours will look & then be so off." You had a contractor and a tile installer ... there is your "help" right there. They are the experienced professionals and should be advising you as to what will work and what won't. The tile installer, if he knew anything about tile at all, should have advised you about how the edges of the tile would look without trim. That he went ahead and laid it that way and left it that way is ridiculous. It looks bad and reflects badly on him. Vote for StoneTech's solution, and while I like Tre's, too, I'd be concerned about losing available space inside the niche if the tile wasn't demo'd first. If setting a prefab box on top of the existing tile, I'd make sure there was room for the size of the shampoo bottles you intend to store there.

In our guest bathroom we have a corner basket. It holds a lot - a heavy shampoo bottle, a heavy conditioner bottle, shaving cream, face moisturizer, etc - and no signs of sagginess. It's screwed in with screws which are very strong. In our master bathroom, we have two niches. Left side is DH's...right side is mine...which is handy if you use different products than your partner. They sit right under the shower head which I would highly recommend. You would think that they would get wet in this area but they don't - because the stream of water from the rainshower is further forward. We don't have any problems of water build up in the niches. They are framed with Calacatta marble pieces, and the backs are a Calacatta mosaic:

Hi, I don’t think they have to match. It’s a separate area, so anything that complements will work! As long as you select other surfaces that are in the color family, it will look nice!

That has nothing to do with whether a niche is "in or out" (but a vast majority include it in their design and scope of shower work). Unfortunately you had a very unqualified tile installer and it is beyond unacceptable workmanship. I'd be suspect of the most important part of your project which includes the preparation for the tile installation? Get a written description of all work done and ask for confirmation it was in accordance to industry standards (the visible workmanship is not). See below for more information: 13 QUESTIONS TO FIND THE RIGHT TILE INSTALLER Qualified tile contractors have the verifiable experience and use proper methods and materials. But how do you know your contractor is qualified? We have surveyed homeowners, designers, contractors and other construction industry experts to compile a list of question every homeowner should ask an installer before starting a project. To help ensure the tile contractor you hire is the right fit, start with these 13 questions: 1. Are you licensed in your area? Verify. Some states do not require tile contractors to be licensed 2. How many years have you/your team been working exclusively as tile installers? It takes many years to become proficient as a dedicated, qualified tile professional. Five years or more would be an expected minimum. 3. How were you trained? Do you participate in on-going professional training from organizations and/or manufacturers, and specifically what? Tile installers who have completed an apprenticeship under a Qualified Tile Installer/Organization and participate in industry training are generally more likely to follow standards and industry recommendations and stay current with products, materials, and industry updates. 4. Tell me about your favorite tile installation project and why. What project(s) were challenging for you and what did you do to overcome those challenges? Get to know the tile professional as part of your project team. Do they take pride in their work? If you have a General Contractor (GC) or Designer who is hiring the tile installer, it may make sense to request meeting with the GC/Designer and tile installer in advance of the installation to plan and answer your questions. 5. Do you have a company website or social media pages with photos of your work? Professionals will have a public presence that is available to consumers so you can review their work and customer reviews. Lack of a traceable, legitimate, and experienced business should be a deterrent to hiring. 6. Can I speak with recent customers and view photos of those projects? Qualified, experienced tile contractors will have a history of satisfied clients that are happy to recommend them and share their experience. 7. The TCNA Handbook coupled with the ANSI Standards are the industry recognized guidelines for the installation of tile for a wide range of applications. A qualified tile professional installer will be familiar with and know how to specify and use these reference tools. 8. Do you have successful experience working with the type of tile I plan to use? There are different methods, materials and considerations when planning and installing various tile products such as ceramic, porcelain, large format tile, handmade tile, mosaics, natural stone or glass. Verify their experience and training with the tile product you have chosen for your project. 9. What manufacturer’s products do you use and do you comply with manufacturer instructions? There are many manufacturers of quality tile setting materials. Most perform well with use of approved methods and adherence to manufacturer specifications. Most qualified tile installers will be well versed on the methods and systems they prefer and should be able to answer your questions about their process and materials and associated warranties. 10. If wet areas (showers/baths) are to be included in the work performed, what approved system/methods will you use to assure a long-lasting installation? (Shae, note this is not at all on original draft. Complete replacement): Tile installations in wet areas require some very important preparation to avoid leaks and unwanted moisture problems. Unapproved methods, and the use of materials inappropriate for this application can contribute to a very costly and unwanted result that too often requires complete removal and replacement by a qualified professional. A quality installation should last decades or longer. 11. Do you have liability insurance, and if you have employees, are they covered with Worker’s Compensation Insurance? Make sure you can verify appropriate insurance coverage. 12. Do you belong to professional organizations like NTCA (National Tile Contractor’s Association)? Industry involvement is one indication of a tile installation company’s commitment to their craft. It gives them access to education, technical information, and other resources to assist them in professionally serving you. 13. Are you a Certified Tile Installer (Ceramic Tile Education Foundation, CTI) or do you have Certified Tile Installers on your team? The certification of tile installers is an important step forward for the consumer and is “one” indication of professionalism. The industry has established a process to certify tile installers. Certification identifies an installer as being a dedicated and knowledgeable professional whose competence in installing tile has been verified to meet specific tile industry standards.