I've bought my stunning dress at Wed2B! It was a very pleasant experience. I've been to two of their shops, and found the one in the second. I was suspicious too about their prices, but the dresses are beautiful and of high quality. A few tips though: check before you visit the shop of your choice what their stock is. The first shop I went to had only 1 of the dresses I liked from the website (from a list of 8). You can just go in, try on 4 dresses (extremely nice, friendly and experienced staff in my shopping sessions) and if you want to try on more, you choose 4 again but then (if it's busy) you'll have to go to the back of the line again and wait until it's your turn. The first shop I went to was really busy (a Sunday) so I spent 4,5 hours to try on 8 dresses. The second time I went (different shop), I went on a Friday and I was the only bride there.
I was lucky to find my dream dress in the right size. When you check stock with the shop, check sizes too. My dress didn't need alterations but they did offer me a seamstress in the first shop, so I think they can do that for you.
I just took my dress home straight away and it's been in a box up until a few weeks ago. It's in a clothing bag now, to hang and uncrease for the fast approaching wedding.
They also sell lovely veils, hair accessories, flower girl dresses and bridesmaids dresses.
So don't be scared, just go, on a weekday, check stock beforehand and see if you like something!
Good luck! x