GBR was very communicative. We use them prior to installing solar panels on our roof. Our entire roof needed sheathing before new asphalt shingles could be laid. They arrived promptly working through the day and routinely updating me as certain issues arose. Our old skylight needed to be replaced, so they fitted a new one in that day. They will be coming back to complete the inside trim work, but other then that they finished the job in one day. Upon inspection, we did ask them to readjust some gutters and downspouts that weren’t correctly put back, but they did so diligently.