I've had this bike for well over a year and I really enjoy riding it. It's quick, nimble, yet also very stable at high speeds. You can get the power down really quick with this thing and it will perform nicely on any paved (and sometimes unpaved) surface. My favorite part about this bike is that it's still exiting to get on and won't be outgrown for everyday riding. I also love the workhorse 105 drive train, as it performs well, is easily self-serviceable, and cheap to upgrade or replace.
The toe overlap needs calling out, though. I'm 5' 9.5", 32.5 inseam, size 44 shoe, ride a 54 frame, and there is about an 8-10mm toe overlap. This wouldn't be an issue if the bike had somewhat different geometry (e.g. longer front-center through slacker head tube angle from 73 to 72.5 degrees). This is rarely a problem, but when it does occur it always makes my heart skip.
Overall, I'm very pleased with the SL6 Sport. A solid, all-around performer that's easily serviceable and upgradable.