I recently visited the Montgomery David's Bridal location to look for bridesmaid dresses with a soon-to-be-married friend. We were impressed with the huge selection of dresses at David's - tons of styles in tons of colors - and the wide range of availability in different sizes. We received courteous service, although I wouldn't exactly say that it was particularly warm. I guess it's hard to be as excited as a bride is when you deal with weddings day in and day out, but the sales associates didn't show very much enthusiasm.
Overall, we had a nice experience at David's and I'd recommend it to anyone in the market for a formal dress.