They low balled me on a bid for a smaller job. Once on my roof they quoted reasonable price on shingles. Once ALL of the shingles were off they convinced us that ALL the roof decking needed to be replaced before they could re-shingled. Quoted the job at about twice the price it should be. Never finished the original quoted job. They didn't tarp the roof so when it rained my house flooded.
Should have gone the other way when they didn't know basic construction terms (like Gables and Decking). Cut corners on all aspects of the job (like using 1/2 inch instead of 3/4 plywood which was quoted, not laying down waterproof membrane)
Definitively avoid.