I purchased this cover July 2019. I use it on a 18x33 oval pool and its a perfect fit. I have it on a solar reel. We have a heater and after testing it I will say that it most certainly helps hold the heat in.Since just over a year ago, if I had to guess I’d say I’ve taken it on/off roughly 15 times or so (give or take). The ONLY concern I have right now is how long this thing will last. Lately I've started seeing small little blue pieces in my skimmer which appear to be coming from the cover somewhere. The areas that I latch the cover to on the solar reel (white clamps), I’ve had one of those so far rip and I can so others getting close to. One i’ve already had to relocate the position as I knew it was about to rip.My guess is just being in a saltwater pool and baking in the sun, over time the cover will slowly start coming apart. I was hoping to get a solid 3+ years out of it but based on how it’s doing at 14 months that I highly doubt it will last that long.The bubbles are falling off the cover. It's only been used 2 1/2 summers. It's stored inside during the fall, winter and spring. I've had covers rip but never had the bubbles fall off! Not just a few but hundreds of them. In fact, it doesn't even do a good job of warming the water so many are missing. It should have lasted longer than this. My prior covers lasted over 5 years each.I live in NC and I’ve always had trouble keeping my pool warm. The nights get down in the 60’s. Every summer my pool hangs out around 74 degrees. I pool this cover on and keep it on when we are not in it. The temperature rose consistently 2 degrees each day and now has topped out around 86 degrees. It looses a few degrees each night but nothing major and by noon the next day it’s back up.The solar cover is accurately sized and helped to keep our pool clean and slightly warmer during the late summer/early fall. I was hoping it would keep the water warmer, but summer does come to an end eventually. The pricing was fair and we are pleased with the purchase. It also arrived very quickly.This solar cover was advertised as "12 Mil Covers include 7 year warranty, 2 years full." I was expecting to get at least 3 to 3.5 yrs. of good service from this cover. During the 1st season, it looked like the lamination was beginning to separate. This year, there was increasing blue dots in the water and skimmer basket. By mid August, there was wide spread perforation, as can be seen in the photos. The performance was good, only the 1st year.We contacted Harris Pool Products and they responded that they will have there specialists look into the matter. After 10 days I emailed again. That was a week ago. Waiting for their response.Bought in 2019. Put it on pool this year, tearing and blue circles are floating all over the pool. Compared to what they cost this year, two years isnt bad. See how my new one does.Perfect size.Works as described to heat pool some.Easy to put on if you have help and easy to open if you have a roller.A great buy!Bought this for our in-ground pool. Works just as good even though it's for a above ground pool. Cheaper and let's face it they only last a few years anyways. Why pay more.