These guys were pretty good, near the top of the pack in the list of salons I visited. The store is laid out nicely, with double racks of dresses in a big circle around a "runway" staging area. They had a good range of prices, from a few hundred up to a few thousand; most of what I liked turned out to be in the $1400 range.
While friendly, the two saleswomen I worked with seemed to only partly know the stock and stumbled a bit when asked to bring a few more dresses that matched my request. I visited once and wrote down a style number, and when I came back with my mom a week later and asked to show her the gown, they acted somewhat put out. The original salesperson wasn't there, you see, and they'd have to go find the dress by hand, by looking at all of the labels.
My small complaints aside, La Belle Elaine's is well worth a visit. They carry a big selection of gowns. Their prices are fair. Their dressing rooms are large, well-lit and laid out like small lounges. They have a very good accessories selection. I would definitely add them to your list of stores to visit.