I ride a Santa Cruz Blur XC, which is not women specific, but I bought it because it fit me better than any non-custom full suspension that I have tried. (Santa Cruz's women specific bike, the Juliana, has the same effective top tube, but had a higher stand over.) I am only 5'0" and my inseam is barely 27". I put a slightly shorter stem on it than what it came with, and it fits like a dream.

I have a beater hardtail mountain bike that I use as my spare, or to ride to school, or let friends borrow. It's an XS (13in) Novara Piedra, which is women specific. The geometry is different from the blur, more upright, but I don't think that's due to the fact it's women specific because the men's version, Novara Aspen, has the same kind of geometry. I think Novara just didn't do a great job with the XS frames. Fine for riding around town or a back-up bike, and I can't complain about the price.