I would say so. My sister got hers from Lulus. She looked at the size chart and read all the reviews before picking a size to order. It fit PERFECTLY. Just needed a hem. If unsure or inbetween, go up a size and get it taken in. It's still cheap enough to not break the bank after alterations!
GCGME.com- I just got my bridesmaid dress for my best friends wedding from here, and it is amazing! It was $64, and they have a lot of options ranging from $30 to over $100. It was 2 day shipping, and they have all sizes.
Unionstation.com. My girls are going to get theirs from there. You can rent or purchase - short dresses are $50 to rent and long are maybe $75. The dresses are designed to be adjustable so alterations aren't needed.
Just chiming in to say that we got our flower girl dresses from jjshouse and they are gorgeous and great quality! I was weary too because of things I had heard but I am so glad I ordered anyway. Lulus is also a wonderful option! Half my wardrobe comes from there and I've never had a single issue. Their return policy is super easy too!