What I noticed: I fit all 3 engine mounts at the same time and so I don't know how each separate one affected the car but I can talk about the effect of having all 3 mounts on. The first thing I noticed was the extra vibration that everyone's been telling me to expect. When the car is on and parked, the engine vibration is transferred right into the car but I like it, you can feel the V6 the whole time and just know it's waiting to be floored (my kinda thing). In my opinion, even though the vibration increase is the most I've had, it's not intrusive.

What makes you not care about the vibration is the feel of the car when it goes. The car DOES feel faster, I think you'll notice this more on older cars since they're mounts would have been used and abused. When shifting fast (e.g. without letting you're foot off the gas), the power isn't lost in engine throw (which messes up the stability) but instead the power goes to the wheels and you just go. Take off has improved as well as downshifting and double clutching. This modification complimented everything else I already had on the car, Full thumbs up. I wouldn't get it as a first mod. though. One final thing, when you rev the engine and look at it, you notice it doesn't anymore... AT ALL!!!