A couple year old Tiagra equipped Cannondale Synapse. Got it used out of my LBS's rental/loaner fleet early this spring. Like it a lot and it suits my purposes well. But I've never liked it's Tektro brakes. Swapped them out a few days ago for Ultegra 6800s. Great upgrade! Shimano 105s probably would have worked just as well but, what the hell, in for a penny in for pound.