I have a vinyl liner, rectangular, 26,000 gallon pool. I would like an automatic cleaner. My biggest priorites are the following order.
1. Lightweight. Preferably something under 10 lbs. If I dump it in the water before work, I would want it light enough so my daughter could pull it out on her own if she wanted to swim.
2. Reliable. Speaks for itself.
Speed is not a big issue for me. I am more concerned about the above three. I do have a very strong pump. In fact my jets are so strong on the side of the pool you can barely sit in front of them.