In my experience, I've been able to walk into RBS with a flat, and leave with a fix within just a few minutes. Every time.
The last time I had a flat, one of the techs suggested better tires and I still left with within a few minutes, but this time with much better tires! Gotta love these guys!
I was thrilled to have found this bike shop which serviced my electric bike. They completed the service within three days which I thought was quick. I will use them in the future.