I have Performance's Forte branded 10-speed group on my 'cross bike, and mid-level 9-speed Microshift levers (with Sora front and Tiagra rear derailleurs) that came stock on my Felt road bike. I've ridden several hundred miles on both bikes and have not been let down by the Microshift stuff. At my level of disposable income Microshift is perfectly fine compared to Shimano or Sram components that I could afford. I realize that DA would perform better and if money wasn't an issue I'd be riding DA, but that would also be almost as much about aesthetics as performance. My $0.02 is that if your budget limits you to Sora or used Tiagra then consider brand new Microshift, likely for less money.