There was no hinge location choice available in my frameless shower door configuration other than side mount which I am very happy with. $175 for the unknown GlassGuard treatment that may or may not perform as well as you expect or $4 for a bottle of RainX, the go to for years. Guess which I chose?

Before using daily shower sprays or any cleaners stronger than mild dish soap, check with the technical support departments of manufacturers of all relatively new shower components to be sure any cleaners or sprays won't damage or void the warranty of the shower components. Daily showers sprays were often specifically mentioned as "do not use" when I was choosing the plumbing "trim" items for our new bathrooms (shower valve controller, showerhead, hand sprayer, tub spout, etc.). We completed a complete DIY bathroom remodel one year ago (my first "brand new" bathroom ever), and I have to say I've become a confirmed squeegee-er and water drip wiper. I want to enjoy and maintain the "newness" of this bathroom as long as possible, so for the first time I'm motivated, rather than resigned. It took a while to train the family to squeegee the vertical surfaces and wipe dry the metal surfaces with a microfiber cloth and hang it to dry (the teenager is still resisting, even though it literally takes only about one minute), but thankfully my husband has seen the light. Of course, the daily swipe & wipe (& an efficient bathroom exhaust fan) doesn't do away with the need to clean the shower periodically, but it does reduce the effort and allow for milder cleansers that are easier on me and approved for use on my new bathroom fixtures and surfaces.

I did ours through Wilson Glass. They shipped me a kit of parts/hardware and suction cups. They placed the glass order with a local tempering plant. I picked up the glass and installed. Shipped the suction cups back to Wilson when I was finished. That was 3.5 years ago. The main things to keep in mind are that 1) you have to do the measurements, so any error is on you and 2) the glass is heavy. We did 1/2" glass, and our fixed panel (admittedly big) is about 120lb, IIRC. The 30" wide door is more like 70lb. Getting the door and panel in place took 3 people and 3-4 hours. Mostly 2 to move/position/hold and 1 to mark/drill/install hardware. Measuring for the door and panel was a challenge, and having a helper for that makes sense if it's more than just a door. Our fixed panel is 42" or so wide and has a cutout for a bench. It's held in place by 4 small clips/channels and gravity. Locating them (2 on the wall, 2 on the bottom, with the cutout in between) was also a painstaking process. If that doesn't dissuade you, go for it. I saved somewhere around $700 to $1k by DIYing it.

We lived in Tokyo for a few years and one of the bathrooms in our apartment had a bathing area wet room. I think they are pre-fab kits, like a room within a room with tub and shower area and a door that seals tight with a gasket. There was a step up into the wet room. Luckily, I also had a daily housekeeper that cleaned whatever mess the kids made in that wet room! Imagine a bubble bath that can spread outside of the tub ... the kids loved it! Rest of the bathrooms had regular tub/showers.