I haven't been and got a quote yet but the ones if seen roughly price from £1500- £3000 however that's for both top and bottom teeth. I only want to get my bottom teeth done as the top are straight and I remember when I was a teenager and the dentist said if I did want a brace it would only be needed on the bottom anyway. So I'm hoping that as I only need one set it will be half the price haha, as for braces not lasting, have not heard that. But like cams97 said you have to wear a retainer once your brace is removed regardless of what type of brace you get, usually up to a year. BUT what about speech that's what I'm most worried about I don't want to be lisping?