Well worth it, in my humble opinion. The front takes about 20 minutes. THe rear mount can take 2 hrs if you have to kind of figure it out as you go. There are a few how-to's at another site. PM me for the link.
Honest review:
Helps with wheel hop.
Better power transfer.
Some say better shifting due to lack of tranny torque.
Produces a resonance around 4k rpm which can get annoying.
Steering wheel vibrates. This lessens when the mounts settle in. You also get used to it.
Using the AC can produce a stall like feeling when the compressor kicks on.
My wife didn't hate them so that should say alot!
