I bought the Aquabot Supreme last year, replacing some polaris kreepy krawly type vac that ran on the filter suction.

Simply put, I LOVE MY AQUABOT!

I have an 18x36 IG Vinyl, sort of kidney shape, and I find that it does generally clean all areas given the time to cover. It climbs all the walls and scrubs the waterline. If there is a particular area that it might be missing and I don't have the patience to let it keep running, I simply pull it gently by the cord to the area it needs to clean.

The other added benefit of using autovac with a self-contained filtration/pump system, is that it acts like a second filter for your pool, putting no additional load on your filter. Mine claims to filter nearly 5K gallons per hour, turning my entire water over in 5 hours.

I highly recommend.