I'm so surprised by all the negative reviews on this site! I've been using RtR for about 4 years, and have maybe rented 5 times total. One of those times was for all 10 bridesmaids in my wedding! The most recent time was this past weekend for a formal gala I attended with my husband. All easy and great experiences.
The one bad experience I had was a few summers ago, I ordered an amazing dress for a party I was incredibly excited about, and we were traveling there, so no easy shopping options once I realized the zipper was broken on the dress that was the correct size. I had to go buy one last minute. However, RtR was very understanding, credited my cost, and gave me a discount on my next order.
When my bridemaids rented the dresses, it worked perfectly. We chose two Badgley Mischka dresses, one light purple, one dark. Everyone ordered 2 sizes, so we had plenty of options. I think one girl had a "replacement dress" (a different dress altogether) in one of her sizes, but we had so many spares it was fine. Everyone looked AMAZING. And no one had to spend $250-$300 on a bm dress they would never wear again.
Overall, I definitely recommend this site!