I bought this for a 16' x 48" round Intex ultra frame pool. The cover is great and works wonderfully at heating up the pool water. It is big enough to cover the top of the water with no extra over hang. There is a slight gap around the edges but only about an inch all the way around. Not a big deal at all. It has heated up my pool to feel like a warm bath more than a cold pool. I've found if I turn my pump off only the top 3-4 inches are real warm and the bottom of the pool is cold HOWEVER leaving the pump on circulates the water and the entire pool is kept warm! It only took 2 days to get really warm like this in 70℉ weather. I found myself warmer in the pool than out of it on a nice 70℉ breezy day lol. I also live in an area of NW Oregon that is very windy most of the time and I can say this cover hasn't blown off once. Not even close. It just stays floating on the top of the pool. The added bonus is it also helps keep bugs and debris out of the pool. I am fortunate to have been able to set up my pool where trees aren't around or close over it but there is a large field with LOTS of dandelions blowing their "wishes" all over the place when it's windy. This cover has helped tremendously in keeping them out of the water.I spent a lot of time looking into these types of pool covers and what color worked best and after a lot of reading I figured clear would be best for me. I can not comment on if it works better than black, grey or blue but my common sense says clear will magnify the heat/light in a similar way as glass would with the sun and thus create more heat and retain more heat. I also had the forethought to order this while getting the pool ready for set up so when it came I was in the process of filling the pool with water and was able to put it on when I was done. I ran the filter continuously for 48 hours then put it on a timed mode per manufacturer's recommendations and when the pump went to timed mode that's when I got only the top few inches to heat versus the whole pool being heated with the pump on continuously. Once I put the pump to run 24 hrs and left it I didn't have the cold bottom anymore so I recommend a pump on continuously for whole pool heat with this cover. I also would like to mention that I have 3 children, 9,6,3, who have each tries to pop the bubbles on this cover without success, and promptly given timeouts because of it lol. It is thick. This is NOT your standard bubble wrap. This stuff is thick and strong. Strong enough to withstand three naughty children trying their hardest to pop the bubbles without being able to strong.I've had this product for two months now on my saltwater pool and there is no sign of failure yet. My husband was skeptical and a bit irritated at first I bought it and thought I was wasting our money, but after experiencing the difference it makes he praises me on the purchase.I highly recommend getting this cover for your pool and can say you won't regret it with confidence. When the day comes I need to replace this cover, it is plastic after all and nothing lasts forever!, I will be buying it again and have already set this item to my wishlist so I can find it easily when that day comes. Yes, I am that happy with it. I know this has saved me a ton of money already versus buying an electric heater for my pool and the cost of electricity to run it as my husband wanted to do ?. Buy this and be happy jumping into your warm pool and have fun