I received multiple competitive offers. The sales reps were responsive to my requests for modest changes when I asked. What is unclear to me at this point is the quality of the installation though Energy Sage does provide some information on the issue: those with the longer track results of good results get the higher certification level. One minor note of caution: few firms use software that includes the latest fire code changes adopted by many towns that restrict panel placement. Simply overlaying a graphic of solar panels on a Google Earth image will often not be accurate. As such, those with limited roof space may want to read up on their local code to have a more accurate understanding of what is and is not possible for their roof. A comparison of the sample panel layouts from the different bidders can hint at which firms are more detail-oriented and which ones may lead to more surprises at the on-site visit, installation, or city inspection.