I got the medium. I was looking online and it appears that the men's medium falls somewhere between the women's small and tall in most areas. I don't know enough about frames and frame geometries to say whether they look proportional from the specs. I thought womens bikes were supposed to have proportionally shorter top tubes to help w/ reaching the handlebars.

I'm 5'4, so I'm not sure what frame size is appropriate. With the Trek WSD they put me in a 15" Frame, I had a lot of trouble w/ the saddle being too close, among other things. I tried the Vita in 2 sizes and the smaller of the two was more appropriate. I don't know if that was the medium/large or small/medium. Since they showed me the Vita, which is just a women's bike, I assumed the Quick I first test-rode was the women's version, but as I said, I'm now second-guessing that.

The women's version of the Quick has "Lock on" grips, I'm not sure what that means, and yes, the handlebar is a bit smaller. I don't have a problem gripping the brake levers thankfully.