We didn't end up using their services - my review is based on the bidding process.
RENCO was very fast to respond to my bid request through Yelp. They set up an appointment, Keith called the day before to confirm, and he showed up on time. He was very honest about our needs and gave us a free bid.
Turns out, we didn't need the work done as desperately as originally thought. In the future, when we need roofing work, RENCO will be the first call we make!