I've been to a few locations to get lab work done and by far this is the best place to get in and out. I usually make an appointment if I can but the few times I've gone and haven't had an appointment I've been in and out in 15-30 minutes!
The check in process is always easy! The receptionist is very kind and always welcoming. It appears she knows her regulars by name, just an observation from waiting there.
The latest thing is that they have a TV in the waiting area so you can see how many minutes until its your turn - this is the best thing since sliced bread!