I began going to Sooner Wash several years ago because they were the closest to my location. I always enjoyed the fact that I could do laundry in clean comfort with reliable machines for no more cost than the run-down, unattended laundromats charged. The machines are $1.25 to wash and 25 cents to dry for ten minutes.
However, the best part for busy people is that you can drop off all of your laundry and have them do it for $1 per pound. They do a better job than I would, and I don't have to invest the time in my clothes looking good.
Sooner Wash is about is good as anyone would hope to find.
Pros: Excellent creature comforts, workers on-site.
Cons: Not 24 hours, but that's nitpicking.