I use a solar blanket in May and September, to cut down on heating costs (because during those months, swimming is more rare, anyways). It does save on running my pump (and running my chlorine generator), but honestly, it is really ugly and a pain to work with (pool odly shaped, so a roller doesn't really work).

I wish someone would come up with something as efficient (or more), that wasn't such a pain...They would make 100s of millions if not more.....

(Haven't tried any of the liquid solar products, because a) I am a skeptic b) it is just more consumables I have to buy c) my wife is worried they kids will drink it by accident in the water)