I have ACE on an Envoy for my personal spa. I'll be the first to tell you that the 2010 release of it was hell. Every dealer hated it. The launch was what jaded so many dealers. What then proceeded to happen, as the system got a lot better, a lot of dealers were unwilling and still are unwilling to give it a shot. You also have some dealers that didn't want to take the time to explain how the system works and what the customer needs to do in order to have long term success.
BullfrogSpasMN is a pro and he can help you out, but if you need any other help, feel free to reach out to me. Plenty of my customers choose ACE, not because it's going to save them money, but because of how it feels.