I bought a bespoke one for about £150. The quality was fine and it turned up in good time but I didn't end up wearing it as it I went off the style. My reasoning was that if i didnt like it i wouldnt be too out of pocket. I went with a very reasonably priced one from Monsoon in the end which was really lovely and simple. There was an article on today's Rip Off Britain, coincidentally, where a girl bought a prom dress which was awful quality but they wouldn't take it back. I think you do take a risk with these places.