M.C.
The best fittings I've gotten were at Nordstrom's. They really knew their stuff. I did buy a bra there for about $35, and it was so wonderful I went back for another.
The worst fitting ever was at Victoria's Secret. They refused to admit that they did not sell a size that would fit me and tried to fudge me into one of their sizes. Then they wanted to tell me it was my fault that it didn't fit.