I recently had a roof installed on my house by Best Choice Roofing. The work was subcontracted out, which made me nervous from the begining. I have been in the house 10 years and I am just an educated home owner not a roofer.
There were some time line issues and scheduling delays but that is another story. Some things that I noted install wise was they did not strip all of the original tar paper from the decking on the back of the house. This was in the contract and leads me to believe the decking was not checked properly for water damage which is a possibility because I had quite a few blow offs on this part of the roof. They proceeded to install #15 paper over the existing and secured it loose fitting. They also did not replace all of the drip edge in areas where it looks like it would take extra work and cutting to fit it correctly, basically being lazy. Some of the drip edge is bent and damaged. They used Owens Corning starter strip plus but did not secure it close enough to the Eves and rake edges so you can pretty much lift the whole roof edge up easily and stick your hand under it.
There is 1.5-2 inches of overhang on the whole roof which is incorrect according to Owens Corning installation instructions with drip edge. They also botched up the flashing and siding on my screened in porch and did not bother to fix it correctly or say anything about it. I have uploaded a few picture and will upload a few more tomorrow when I get home from work.