The only thing preventing me from scoring a 5 is that the dumpster sat in my driveway an extra day, and then the driver woke me up on my one day off to pick it up. Since he removed the dumpster, I've found 7 nails so far.
There was some debris left in the driveway, in addition to the nails noted above. My neighbors had their roof redone in the fall, and I saw the mess the company they used left, and this was nothing in comparison. Just would have preferred it to be pristine -- and had the dumpster removed sooner.
Klaus Larsen had the most professional sales pitch and most competitive pricing. The Best of Hartford rating also gave me confidence in the company.