Good Solar Reel For Round Pool

I am looking for a good solar reel cover for my 21' round pool. I would like to mount it to 4x4 posts outside of pool and not on the rails itself.
I do not have a deck around the pool. It seems that many have bad reviews.




21' Round 52" pool
Hayward 150 Cartridge Filter
Hayward 2.0 HP pump

I think the problem may be, at least in part, that solar covers turn out to be a bit of a PITA to use, no matter how you manage it.

I think WaterMom has covered this topic here: http://pool9.net/wm-scover/