As CarlD said on cleaning. Our pool is a 20x40 IG and I normally have to empty clean the fine mesh bag twice when cleaning. But, we are still building around the pool so we have TONs of millipedes and lots of dirt still getting in plus lots of pollen and such.

But it takes, at most, 2 minutes to remove/clean/reinstall the bag and go.

I didn't realize the fine bag was $25. At that price, I think the extra 50 I spent on the CG model was worth it (it can with the fine mesh bag and the regular bag, plus charges in 2 hours instead of 8 and is supposed to have 30% more power, but who knows on that part).