We originally had solar pool heating through Diablo Solar Services back in 2007, so when we were looking for electric solar we called them based on a flyer they sent out to existing customers.They came out and gave us a quote, and the cost felt better than other options we were considering so we engaged them to put up the electric solar. The prices seemed competitive, if not more cost-effective, than the other options we were looking at. The workers were friendly, professional, and dedicated to getting the job done. My one issue was that when we originally got the flyer, my impression was that they would move the existing pool solar panel so they could take advantage of the roof space. In hindsight, I wish we had the panel placed in the prime spot on the roof. However, Diablo was friendly, easy to work with, and they follow through on their propositions.