It'll be in your best interest to try to book an appointment for your desired day and time. People who had appointments were seen right away; within 10 min of their appointment time. If you're a walk-in, be prepared to wait at least an hour.
I came in as a walk-in and my wait time was 1hr&45min. I didn't mind so much since I expected to be waiting. The staff does move quickly though.
Every staff member was welcoming, professional, and polite. The woman who drew my blood made it almost painless.
I would recommend this Quest location.