this is the one i'm using:

http://intheswim.com/Solar-Blankets-...-Blankets-I-G/

first season i've had it and used for full season in various weather conditions..the price was right and it works very well in retaining heat on my in ground pool. i haven't noticed any damage including split seams etc. i'm careful to always cover it with the plastic white sheet that came with it whenever it's not on the pool to prevent bubble burts or melting of the cover. (it can get warm even if it's under a good shade tree!)

i figured to stay under the 100 dollar range after reading various opinions on the "lifespan" of solar covers. i decided that even if i went through a cover a year, a 100 bucks was not too much to pay.

it will be stored in my basement in the winter.