Lots of girls on here have used Bridalgown.net. I ordered my gown from them about a month ago, so I still have a fairly long wait! Monsoon Princess ordered her gown off them too, and it got shipped last Friday, so she's due to receive it sometime this week, so hopefully she'll let us all know how it goes (she ordered the same dress as me, so I'm extra keen to know if it's ok!).
So far, for me, I'd recommend them. I had LOTS of questions before I ordered, and Julie was great with answering everything, so their customer service is great, now we just have to wait to see what the product is like - but apparently they are authentic gowns direct from the manufacturers - that's the feedback I've read from them (on these forums) anyway.