I have an in ground 16'x36' rectangle with the 8' deep end (vinyl liner about 27k gallons) last year it was harpooned during hurricane Sandy. I decided to try the all black liner, the first liner that went in came with white alignment marks that were supposed to wash away but never did and the floor of the pool was nothing but wrinkles. I contacted the installer and liner manufacturer and after sending their people over to take a look they agreed to replace it at the end of the season. I also asked the liner company if they would switch the color to dark blue instead of black and was told no problem. Last week the installation company put in my replacement liner while I was out, came home to find another black(not dark blue)liner with a less but a still wrinkled floor and a few spots on the walls. After another call the guy's came back over to fix it and told me that they had already hand troweled the sand prior to installing the liner and that was pretty much as good as it gets. I'm not sure if I'm expecting too much I realize black is harder to due but nobody ever informed me of possible problems except for the safety issues. We expected it to look like every other liner we have had, this one looks like an old lady in a bikini. I would post pic's but I don't have an underwater camera and it's very hard to see without one. Another thing is right now the pool has only a few inches of water in the shallow end and when you look at the 4 corner's the amount of liner material at 3 of the corner's is equal the 4th is much more. I was told that it will fit fine once filled, both companies have been great and I don't want to become a pain for no reason. Does anyone have any advice , had the same problem , have installation knowledge , do I have a legit gripe? Thanks for your time.