My husband and kids had been trying to talk me into getting a pool for years, but I was always reluctant, because I didn't want the work of keeping it clean. So when we finally bought our above ground pool, I insisted we get some kind of automatic cleaner. We bought the Zodiac Baracuda and it has worked well for us for about three years now.
The Baracuda works with your skimmer to clean the bottom and walls of your pool like a vacuum. The main sweeping head is attached to a long hose that fits in the skimmer. The suction action from the skimmer sends a vibration through the hose and makes the sweeper head move around the pool automatically. It eventually hits every spot in the pool.
We have had some trouble with the vac getting hung up around the ladder and it does loose suction at times for some reason and has to be reset by taking the hose out of the skimmer and reinserting it. The hose sometimes will get tangled also and has to be repositioned. Although it does have these issues, it still is a lot better than having to clean the pool manually.