She's been my favourite from the start (there, I've admitted it). I did cringe in episode 4, when she started harassing Simon, and I did shout at the telly on more than one occasion "Claire, shut the f**k up!".
But, she's from my home town (as is Helene, but I've never really taken to Helene), she's obviously the most hard-working, she's teh best of the remaining candidates at delivering to an audience (as opposed to one-to-one selling, where Lee and Alex both excel), she is far better at selling than the two other girls in the final five, she's the best team leader, Alan and Nick have both taken a real shine to her, and since she got separated from the unshaven whinger she's got better and better and better.
I don't think she'll win - I think she's too much like Saira, Ruth and Kristina (as opposed to Tim, Michelle and Simon) - if Sugar tells her to do something she doesn't agree with, she'll argue with him, and there are at least three other contestants in the final five who would never argue with Sugar, but I think she'll get to the final. And as each of the losing finalists has each gone on to bigger and better things than the one who wins the apprenticeship, I don't think that she will be too upset over that.