I just bought the 5100s, but somehow didn't see any negative posts about them until after I installed them. I would say, bottom line they are a great performance shock, and a poor/fair comfort shock. I could notice every crack in the road with my Ranchos and wanted something where I wouldn't feel those imperfections. I didn't get that with the Bilstein. I still feel everything, but handling and cornering are much more solid and confident. To me it rides like one of those lowered import ricers. It rebounds quickly to get you back on track and keep you planted. So while bouncing after bumps doesn't last long, it does happen very abruptly. In a straight line on pavement, the Ranchos were better and the GM 4x4 (non Z-71) shocks probably even better than those. But for cornering and off road, the Bilsteins would outperform the others by far.