I've put about 8k miles on them. Yep, no issues. One thing I like about them is that you can press them into the arms so that they fit your chassis perfectly. Basically, as apexdc is describing, the interface between the chassis and the a-arms is not always the same car to car so there needs to be some way to adjust the location of the bushing in the arm. The stock bushings are so easy to move it doesn't matter, they'll just self adjust. If you can't adjust what ever one you use, there either will be play or it will put stress on the chassis as you force the arm to fit and then tighten the bolts.
It's kind of hard to describe.
Sorry, I've been off this thread for a while.
What I was trying to say earlier is the KEY to an easy install is to measure the offset from the end of the bushing to the end of the a-arm in every case and then use the "tool" to set the new bushings in the same position. You should also measure each bushing end to end so that you can make the monoball replacement the same overall length. You can do a lot of this with some mix and matching of the three key monoball parts. Some might take a little sanding.
if you do all this, CLICK! and the arms just slip into place.
The sad news is I didn't really see this at first. The "tool" will set the bushing in the same relative postion in every arm if you run it in to the stops. That will almost certainly be where the bushing will need to be.
The summary is the front and rear of every bushing has to be in the same relative position as the original or you will regret it A LOT!
I have heard mixed reviews on the life of the monoballs. If a car is being tracked a lot, I think they wear much more than street use with periodic track days.
In retrospect, I might have gone to a superhard polymer for that reason. But as far as feel, they are fantastic and I don't notice any real downside on the street. My car is my daily driver, too.
My hat's off to guys who talk about doing the install in eight hours or so, but I will say the vast majority of time spent by me was trying to refit the arms. Next time (if there is one) would be MUCH faster.
2006 Elise, Graphite Grey/Red leather, Sport Elise Suspension, Cup airbox, ECU ref lash, MonoBalls, etc. etc.
1992 900SS Ducati Race Spec Built by Ferracci
2006 KTM 950 SuperMoto, a work in progress
Old stuff gone: Ferrari 275GTB/4, '69 1275 Cooper S. '72 500 Fiat, old Jags, etc. Never bought a boring car.