This is my favourite clinic - though tricky to find if you only have an address. What I like most about this clinic (and it's a big factor) is that it's CLEAN. And modern. And I don't feel like touching a door knob would be unwise. If any other walk-in would just put in some new tile and updated magazines, they'd be my favourite too.
I only use a clinic for prescription refills as my doctor is not in town and I only make the trip for medical issues. Staff here are friendly, the wait time can vary between 10-40 minutes, but that's decent for a clinic. My only gripe is taking the blood pressure every visit (and being less than polite about it - this seems to be the exception to friendly).
Again, clean. Much more like a doctor's office and any walk-in I've seen and worth the trip.