Pros: straightforward installation, CSA certified, excellent efficiency, clean design
Cons: programming could be simplified, Grundfos flow meter is finniky
I have installed several of these systems and have one on my own home. It has proven to be amazingly effective even in ambient temperatures as low as -25 Celsius I have had +30 Celsius temperatures in my storage tank by early afternoon and I'm in a northern latitude.
With some of my installed systems there have been component problems that were resolved immediately by Enerworks (pump failed on one unit, flow meter on another). We also received no charge updates including a larger accessory expansion tank for each system.
I have dealt with Enerworks for five years now and have found them very responsive to problems and questions.