If you are a little unsure about the specifics of solar power generation, and/or don't have a contractor in mind, this service is invaluable. There is a lot of info to read about at the website, but going through the process of getting a quote and picking a contractor results in you learning about what you want regarding system attributes, and you end up with a contractor that has been vetted by an impartial third party. I only got two bids; i suspect because of the geographical location. If you live in a more populated area, you will probably get mulitiple bids. Anything more than one is a huge help to be confident you aren't getting ripped off. Great experience.