I don't think I would want to deal with a bunch of them on a pool for sure. Here in TX the pool will be hot for a large portion of the year - but I will be heating my spa with propane - which can be pricey - so I was thinking of ways to help conserve a little energy. It will be a 7' round spa - so I would think that one 5' spa ring would help a little - and it shouldn't be too much of a problem to move it out of the way. But I can TOTALLY understand the struggle of having tons of them - I can't even imagine how you would deal with a bunch on the pool every day! But the idea that they feel dirty after you use them for a while - not sure I can deal with that.
Anyone have a specific brand that is better than another? Since I am only having to buy one, price difference probably wouldn't be a big deal.