First off - how big is your pool?
For anything up to 27 feet (and they'll all bow some at that length), I heard lots of good things about the feherguard reel, as well, it's mounting, swinging action is really versatile and easy to work with for removal by one person.

To explain better, a reel situated off the end of a round or rounded end pool is more work than a reel situated across the center of a pool. Reason behind this is you start of with a partial width of cover and the material gets wider and wider as you roll it up, it tends to bunch towards the center and make a mess of the roll up job unless you do about 1-2 rotations per side, pulling outwards on the blanket, then travel to other end pull outwards and roll another 1-2 rotations, travel back etc.
When situating the roller over the center of the pool it start with the wide portion of the blanket folding it in half as it's rolling it up, most then require a person at each end to lift it off and carry it off the end of the pool, the feherguard (one model) comes with two pegs where the reel drops on to, you can buy a third peg, mount it on a post the same level as the rail but off the side of the pool, lift one side and swing the reel over to the post/peg that's set up off to the side - making it an easy move.
To unroll, simply place over pool again, and unroll slowly - when you're pulling on the one half, the other half will move towards the far end from you.