The team at GSS is top-notch. They are quick with responses, knowledgeable about their systems, friendly, and are conscious of cleanliness and running a clean install.
Before moving to New England, I worked in the energy field (including solar) in California, yet mostly for large commercial projects. After scouting around I decided to go with GSS because of all the similar reasons that other reviews have already mentioned. Going solar for our family was a no brainer, and since I already knew about solar and it's various systems I knew I could vet a company that would treat us right.
What impressed me most about GSS that I don't think is mentioned here very much, is that I never felt any hard bargaining, hard selling, or up-selling of any form. GSS (and other installers) didn't know initially I had any knowledge of solar, so I could patiently listen and see what they offer and how they would approach our install/house. Once I started asking questions, installers would quickly figure out I knew a thing or two. It was here that GSS won me over, because they sell reliable products, with a professional install, and are VERY particular about aesthetics. Solar should be functional and can be 'fashionable' at the same time, ex. auxiliary piping and boxes in a convenient yet out of view location.
Their pricing comes in line with other competitors, and our family was willing to come up a bit more since we felt that we shouldn't experience any problems with them. We were even able to quote a electric vehicle 'charging station' install since we have an EV with a charging station (240V), and since they were going to be working on our electricity we asked them if they could do this also. Not even a problem.
Finally, GSS helped us through the whole process of getting into the SREC/SMART (the renewable credit) system so we can maximize our return. SREC is the old system, SMART is the new one.
We are now 6 months after install, and we have had zero problems. No leaks (from roof), no panel outages, and the system just simply works. We are producing energy and receiving credit from the SREC/SMART network. Couldn't be happier. Thank you GSS!