I have a Townie, which is pretty similiar to the Trek Pure...I actually didn't care which bike I got, the Townie, Pure or Giant Suede, but the Townie was in stock and in the color I wanted when I had the money saved up to buy it, so that's which one I got.
It's a very comfortable ride on flat ground. It's not as fast as other bikes, something about the crank-forward design doesn't give your legs as much leverage as a bike with more traditional geometry. My daughter can stand up on it going up the hills but I can't. When she rides her Townie, I can keep up with her, but when she rides her mountain bike, I have to struggle to keep up.
The reason I wanted a bike with a crank-forward design is that I broke my leg really badly a few years back and I have a bunch of metal in there. My foot is not as flexible as it used to be (can't wear heels, for example) and most bikes only feel like the seat is the right height for me if I can only get a toe or two to touch the ground. The flat-foot design makes it feel more secure and less like I'm going to put a foot down wrong when I stop and end up busting the hardware out of my leg.