I was quite surprised at the harsh reviews. Sandra IS on the gabby side, but at least she's willing to hold up both ends of the conversation. And while she may talk your ear off, at least she won't cut it off - she actually gives really great haircuts.
Downsides are: there can be a wait (just her), but she does a thorough job and the cost is pretty reasonable, and her hours can be a little erratic- she can close early without notice, but I guess that's a benefit of having your own business.