I love the Bilt app with 3D CAD diagrams, etc and the voice guidance. Overall, the build was exactly as explained except the roof metal sheet layout. Apparently I was suppose to leave about a 1/2" or 3/8" gap along the starting edge. Flush on the front edge yes...but you need to slide the first sheet over a tad so that it will not come up short on the last sheet. It wasn't so far off that the trim didnt cover the gap. But it would save a lot of headaches if the instructions would just say that upfront.