I have an '09 Pro SL. It's awesome. Great for racing, but I also have no problems doing long training rides on it. It is very responsive. Climbs (and descends) very well. The reach is longer than on my Roubaix, but for any out of the saddle time, I prefer it.

I'm 5'7" and ride a 54cm. I could go with a 52, but I like the longer reach (I also use a 110mm stem).

The only thing I don't like is that I get toe overlap which isn't a problem on the Roubaix. I just have to be careful with slow, tight U-turns. Most of the time, it isn't an issue.