I've been to the Thunderbird Peoria location twice in the last week and had great experience both times. I easily made an appointment online and checked in at the kiosk upon arrival. On my most recent visit I had a 1:00pm appointment on a Wednesday afternoon for blood work and was in and out by 1:10pm. Very friendly staff! I had a student draw blood this same appointment she did a wonderful job.
MAKE AN APPOINTMENT ONLINE, it's quick and easy and will save you time, they take priority in their appointments. (Side note, do not call Labcorp locations and expect to speak with someone. I say this because I heard an older couple waiting say they couldn't get ahold of anyone and the receptionist stated it was an automated response system.)