I had Karen do my wedding dress, and I thought she was great. I had to have 6 inches taken in on my dress- she was altering it up until the Saturday before my wedding. No extra charge- and considering her prices are so low, I would have happily paid more!
I thought she did a great job, and I don't think she is flighty- instead she is just extremely busy. She gets the job done well, though, and at a good cost.