I have had multiple Skidoo's with Holz suspenion (front and rear), a turbo dragon with Timbersled (front and rear) last year, and a new Pro, that I just put ZBroz arms and shocks on last week. IMO they are all very good companies that produce great products. The Holz are maybe a little weaker than the others, but they are also lighter I believe (may be incorrect since I am going off of when I had them on skidoos). I had 0 problems with the Timbersled as far as bending. I went with Zbros this year, due to the fact that I know they make a good product from experience, I matched them up with a set of their shocks that they build to spec, and although they are 1lb heavier than stock, I was willing to sac the weight, for strength and clearance. Also, the arms DO come with sway bar mounts built in, if you choose to run it. (I had them build my shocks to allow me to get rid of the sway bar)