I'm not a fan of David's Bridal corporate (pro tip: NEVER sign up for any of their mailing lists!) but I recently purchased a bridesmaid's dress here, and had a good experience.
I showed up on a weekday afternoon and knew exactly which dress I needed to try on, which helped. The associate had no trouble looking up my friend's account and confirming that I ordered the dress the bride had requested. I was able to try on a couple of sizes, make sure I had the correct dress, order, and be on my way in under an hour, which isn't half bad. Picking up the dress was equally easy. I'll never understand why they have a strictly-enforced "dresses-must-be-picked-up-within-seven-days" rule, but at least the employees are friendly in person.
If you're a bride, you very well might find what you're looking for here and at a reasonable price, although I do recommend you shop around a bit too. David's does make bridesmaid dress shopping really easy, especially if the ladies in the bridal party are spread across the country or you're trying to color match with Men's Warehouse, so I do recommend them for that.