I have had my Active20 for a week, and it is wonderful. I opted to keep my pool open this year (middle TN...lots of leaves), and although I tried to do a good job dipping leaves, there were a few times where the leaves just got out of control and sat there a few days. Not surprisingly, leaves drop a ton of "stuff", so my pool was pretty dirty. I have run the Active20 5 times (by the third it was in great shape), and as far as I can tell, it is pretty much spotless. Walls are clean, waterline is clean, floor is clean, just looks great. Water is cloudy, and I am going to work on chemistry this week. Pretty sure PH and chlorine are off.
Main takeaways:
1. Coverage does not seem to be 100%. My floor was dirty, and after the first run, it looked like about 80% of the floor got vacuumed. I could visibly see the clean/dirty spots. However, that is fine with me. IMO, the job of the robot is not to be able to handle the mess that was in there. The job of the robot is to clean up small messes, but really, the task at hand is to take a fairly clean pool and just keep it tidy. If I get 80% coverage per run for 2-3 runs per week, that should be sufficient to actually hit the entire floor/walls and get full coverage. My plan is to run it 2-3 times a week, and maintain the cleanliness.
2. Ease of use - stick it in pool, hit the power button. It is that easy. Rinsing the filters is also easy. After the first three runs, the filters were pretty gross...slime, worms, etc. Fourth and fifth runs they were really in good shape, but I went ahead and rinsed/cleaned anyways.
All in all, this seems to be a great unit. It will be really nice to toss in the pool when I go to the gym in the morning, and pull it out before I leave for work. Done and done and I don't have to vacuum by hand.