We've had Arizona Chimney and Air Ducts clean out our dryer vents several times and we're very happy with their services. The most recent time they serviced our dryer vent, they also cleaned our chimney and we thought they did a really good job.
I've also referred them to several of my neighbors and one of our neighbors commented on how great they were when they cleaned her chimney. They're very helpful, professional, and do a nice, thorough job.