After reading some reviews on-line, I decide to go see Dave for a proper bike fit on my Tarmac S-Works. Prior going to Dave, I had been on this new bike for a few rides. I was experiencing shoulder/lower back and knee discomfort after 50+ miles. After the first session, I felt a lot better but it wasn't perfect (Dave told me it will take a few sessions to dial in). I went to see Dave the second time and he did some additional adjustments. After my third visit with him, I'm happy. I'm comfortable on 150 miles ride, I'm comfortable on 12K elevation ride. If you are serious about bicycling, go see Dave !!!....