Level is academic. What you want is "Flat." From the pictures, I don't see that. He should have used a leveling system such as the MLY system, or at the very least, made the floor flat. NTCA specs specify that the floor should be FLAT to within 1/16" of an inch over four feet of 1/8" over 10 feet. Kinda doubt he adhered to that spec........

Hey Everyone! I just want to start off by thanking all of you for of your insight thus far. So here is my update: I was able to have an inspector come and look at the floor. He saw what we all saw, and agreed that it was a poor install. He took measurements of many of the gaps in which several were up to 1/16 of an inch wide. He took photos of many of the gaps with a mm based ruler and a X10 magnifying lens and attached them in his report. Over the hour and a half he was at my house, he noted there were hundreds of gaps and even found more problems with the flooring. More often than not they left no space between the wall and the floor for seasonal expansion and actually damaged my wall in the process in a few areas. This, he stated, was more or less a no brained and they would probably have to completely redo the floors. Now my insurance company agrees it is a poor install and actually paid for the Certified Wood Flooring Inspector. Though when we sent this to the Installer they said that based on their "terms of service" that I had signed, we needed to go through "their" Inspector. So my insurance company urged me to agree and go through their Inspection process and see what comes out. And wouldn't you believe it, he was there for about 30 minutes, inspected very few areas that I marked with the biggest gaps, and in the end deemed it an acceptable job via his report. He stated, "The largest expansion between the installed planks on the length was 1/64” (.015”)." And went on to say, "According to the NWFA installation guidelines, there can be up to 1/32” gap between the planks. A humidifier will help in closing the gapping throughout the year." This is kind of insane to me considering we sent them several photos as evidence that the gaps were 1/16" wide... so according to their logic not only did their inspector do a terrible inspection job... but the floor needs to be redone because the photo verified gaps we sent to them were over 1/32" wide... right? I have to get on a call with them next week and was looking for a bit of guidance on how I should handle this moving forward, especially before I discuss this with them. Also, there is a NWFA installation guideline for gap size (1/32 inch), but is there a guideline for amount (count) of gaps? Or do you know where I might find it? Thanks for all of the help everyone, I know I am writing novels here... but this has basically kept my house under construction for months now. I really appreciate your time.

I can attest to what SJ McCarthy explains: the previous homeowner in the house I bought couldn’t be bothered with taking out old flooring before slapping another down. The flooring was so thick that the counters in the kitchen were ridiculously short, and yes: the dishwasher was bricked in! When I remodeled it took my flooring guys six days to jack out four layers of flooring before laying new tile. When all was said and done I found the interior doors and their jambs had been shortened as well! What a huge, expensive PIA to fix. If you’re not going to do the floors right, please just leave them alone. The future homeowner will thank you.

Thank you for helping me. I'm figuring out that I'm concerned about too much pattern. Since the hallway tiles are diagonal, the wood slats coming straight off those tiles might be busy looking. I think I'm talking myself into a border slat around the room and then lengthwise inside the border.