The Polaris 165 runs off the return to your pool, not a separate booster pump. It's very good for larger debris but not the fine stuff. But I found it to be touchy and the random-movement mechanism can get out of balance easily and it starts coiling itself up. When it works, it's great, within its limits.

I was one of the first people here to get a Poolbuster and I LOVE it! I've had it for years now. Nobody knew what it was then.

Get the extra-fine filter. With a full charge I can easily vacuum my entire 40'x16' pool and it cleans easily as well as a standard suction side vacuum. Plus it's far faster to set up and easier to use. There are two drawbacks: 1) the capacity of the filter is too small to use if you have to clear a lot of leaves. 2) Sometimes the battery/motor pack fails and has to be replaced. However, if it happens, it is most likely to happen under warranty. Replacing the battery/motor is not for the fumble-thumbed, but the average competent handy-person can manage it easily. Once I did that my P/B was better than it had ever been.