Thanks for the responses, I appreciate it. I called poolhub's customer service line and talked with an informative gentleman today. I wanted to find out about shipping information and asked a few questions about the hayward. Essentially I was told the hayward was a very good product, that the amor coil has been in production about 4 years and that he hasn't heard of any major problem with the unit. Two questions I have is about the dual pool spa set ups. Are there 2 inputs and 2 outputs, or do you vlave off the plumbing so you will heat the spa and pool at different times? (Don't hot tubs have their own heater? I don't have one now, but thats the next purchase) And secondly, should I set up a bypass valve so I can run water back to the pool without running it through the heatpump when the water is warm? Thanks again. (If all goes well I'll be placing the order this tuesday and installing the unit next week.)