We have had our pool and our Polaris for 11 years and I can't imagine not having it. What I have learned: The scrubbers on the end of the tail are there for a reason, they brush the pool as it moves. The little scrubber wears out, new ones cost 3.99 and we go through 1 every month and a half. Polaris replacemant parts are expensive. There are 8 bearings on a Polaris, and they are nothing more than stainless steel BB's in plastic, two per wheel and cost $10 each. Everything costs a lot and Polaris makes more in the parts world than they do selling the new ones. I do my own repairs but most Pool stores will fix yours for free if you pay for the parts you buy from them. To extend the life of you Polaris whenever you add chemicals to the pool take the polaris out of the pool. So many people never take theirs out and the shock, muratic acid and all the other stuff you may put in there will rot the bag and over time damage things on the pool cleaner. Lastly be sure and check it every so often to make sure its running straight and on the bottom for more effcient cleaning. There is a nozzel on the back of the Polaris that has screws on either side of it. If you loosen the screws you can adjust the nozzel. I played with the setting on it till it ran correctly.
Have fun!