I lost five and a half stone in 2010/11 and have maintained (within a stone) for over a year now (am currently losing the stone - totally due to going "off road" and deviating from my normal low-carb plan - plus an additional 7lb to get me past my original goal).
Like nzmegs, I'm a bit wrinkly in the tummy dept, but I've also had two children. Apart from that, I don't think anyone would know. In fact I started a new job last year and one of my colleagues, when I mentioned in passing re the weight, was completely gobsmacked. She said she'd no idea I could ever have been big as I look "naturally slim"!! Also the beautician who waxes my legs (get me - all these things I never used to do before I lost weight!!) couldn't believe it either - and she's getting a pretty close-up view.
Go for it! If you end up a bit wrinkly round the edges you will still FEEL way better and LOOK fab in your new smaller clothes!