I had a R600 WSD for my first road bike. While it "fit," I had nothing but problems with it, even though it had Ultegra. The derailleur never worked, my husband had to change it twice; i never could easily shift into the big ring. One time, I was commuting home from work and it got stuck in the small ring after going up a hill. Thankfully, i was only about a mile from home. The chain fell off continually, even after I was an experienced rider. The whole shifting thing just never felt smooth, as compared to my Trek or my Kuota.
I would be careful!