It's been a couple of years since I've been to Quest, and I'm thoroughly impressed with how they've evolved.
I didn't make an appointment, I just walked in.
I got there at 6:25 am and was the 4th person in line. They opened the doors promptly at 6:30am. We walked in and they had 2 computer consoles to sign in on. I signed in and had sat down ready to wait at least 15-20 minutes, when seconds later the nurse called my name and escorted me inside to take some blood. The young lady was very nice and upbeat. I was done in about 7-8 minutes.
Great experience!