Alot of "bike mechanics" cannot set up Sram to save their own lives.I have no issues with my Red group. The Sram cassettes are on the noisy side, I guess thats due to the way the teeth are cut. The shifting to the smaller cogs blows away the Shimano. There is no play in the Sram lever. Fast precise shifts. I have small-ish hands...accidentally braking while shifting the Shimano lever isn't fun.