When I was shopping for a road bike, we found that the WSD models didn't fit me well. So while they're a great option to have, I don't think they're for everyone. I ended up getting a Specialized bike, but I loved the Treks, too. 2cm can be very significant when it comes to your knees. I was having some knee soreness and my husband just moved my cleats a tiny bit and it made a huge difference. Make sure you get a pro fit from your LBS.