On time, great communication, and a hassle-free transaction. They don't try to over complicate the services they provide, and are completely honest and transparent with how they conduct business. Best of all they do the work right there in front of your home, so it's not like they're in the back of a garage that's off limits to you. I enjoyed speaking with the guys who came out to do the work, and seeing them put it all together right in front of you means you know they're doing a great job. Of course you don't want to be the backseat driver, but it's fun to watch (even learn) how they do what they do.