these shocks are smooth, don't tend to leak or come apart on the trail, there are other good shocks in this price range, but the cheap ones are so bad that I didn't want to take a chance again. 2 of my friends use these shocks and have had no problems. ae has been building rc products for years and have always sold high quality stuff.
smooth as butter on my Capra.
used 30wt, the top shock hole is larger than I'm use to on 1/10 stuff, I used the pivot ball that came with these on the front and the Capra extended pillow ball on the back.
The shock operates smoothly. I took them apart and reassembled them with green slim and 30 wt oil. So far, they haven't leaked. Springs are soft so if you have a heavy RC, you may need stiffer springs.