I go for blood work regularly and I find it advantages to book an appointment since it is a busy place; this way you don't wait more than 15 minutes or so. As for the staff, they are very friendly; if

Unfriendly services. long wait! if you don't book online, you have to wait a very long time. waiting room is jammed packed. if you dare asking "how much longer", they don't even look at you.