I bought this service. So far, everything has worked like a charm and the training videos are excellent. My default zones for circulation (you can have 3 selected at a time) were set to 3, 8 and 10 and they have been performing well, so I have not had to change them. I am not sure quite yet the optimal strategy for when/if to change them. I may needs to re-watch the 3rd training video as I believe it covers zone selection strategies.