The Magni-Clear been on for 2 days now and it works VERY WELL. Our pool is normally around 83 degrees...it was 93 after 24 hours - went down to 90 after we got into the pool, swam around, and got rid of a few cool spots. This is my first pool cover, so I cannot compare. What I can say though is that it was just as warm on the bottom of the pool as the top. There were a few cool spots probably from where there were larger airbubles between teh water and pool cover.

Now I just have to find an easier way to store this sucker...I was hoping to avoid the reel costs.