Our pool should (hopefully) be finished soon and I know I am going to want a robot pool cleaner. The pool is 20x40 and very curvy. We have a ton of trees around it so I expect a lot of leaves and debris. It is vinyl so the cleaner needs to be safe for that type pool. My husband is gone a lot so I will be the one to mainly maintain it, so I need something that cleans well, climbs the walls, and is fairly easy to take apart and clean out the debris. I am looking at either a Dolphin Nautilus or Hayward SharkVac. I don't want to spend a ton but also don't want something that always has issues or is too difficult for me on my own. What are your recommendations and which ones should I definitely avoid?