I'm putting this out there because I read quite a few bad reviews about David's Bridal! I live within walking distance of one though so I was still going to try despite the reviews.
I literally had an amazing experience there. Everyone was exceptionally nice and professional and helpful and I found my dress within the hour. I went to the David's Bridal in Victorville CA and I strongly reccommend it to any brides searching for their dress or bridesmaid dresses!
If you'd like more details on the visit, I wrote a blog post on it here (Even if you don't read it...I hope the point comes across that David's Bridal was awesome to me!):
http://curiosityisthecure.blogspot.com/2012/01/wedding-planning-dress-shopping.html