Lead up was good, options were given for different types of singles, no options were given for types of skylights, except opening or non-opening. We chose non-opening. We were given instructions on how to mark the opening for the new skylight. My husband did as they instructed. Dumpster arrived as scheduled. Installers arrived as scheduled. They we able to mostly finish everything in one day... rip off, replacement, & skylight install... Before the installers left (at 9pm) they did tell us they had run out of flashing and would come back the next day to finish. For the most part they were able to keep the old roof garbage on the tarps... however, after they had gone over the area with their magnet, they used a blower and blew a bunch of bits off my driveway into my grass... turns out it was a bunch of nails and roof staples they blew into the grass... We ended up purchasing our own big magnet to run over the grass... I've got kids who don't like shoes... fortunately, I'm the only one who's found a staple the hard way. :-( The next day we were able to see the work that was done. The roof itself looks good...but... However, they put the new skylight in the wrong spot. They admitted this was their fault and fixed this within a few days. They also had ripped 2, 10"x4" chunks of our siding off, along with a few very long cracks. They had "fixed" the cracks with black roofing tar (we have a light gray house. We were able to paint over the black tar... but still not the best choice of adhesive.) All of this damage is on the front of our house above the garage roof and is very visible. We ended up reducing the amount of the final bill, but in my opinion this damage was because they were in too much of a hurry to finish in one day... they could have saved the big chunks of siding they ripped off and we could have glued them back in place... but instead we have to replace the boards. It took them more than 2 weeks to comeback and finish the flashing... in this time we'd found another area, they had not pointed out to us, that was missing it's flashing. The flashing and chalking was eventually finished to our satisfaction. Final bill has been settled. However, because of the damage that was done to my house, I don't feel comfortable recommending them to my friends.