Hmmm, the mounts
When I installed them, I did them in two stages - first the pendulum mount, and then the transmission and engine side mounts together.
With just the pendulum mount installed, the increase in vibration was so negligible that I began to question whether people were crazy when they were complaining about it. The front tires gripped alot better on launches and there was no more wheel hop. Basically, you get all the advantages of the stiffer mount without any noticeable drawbacks (except a little more vibration when in reverse). A normal person wouldn't need more than the pendulum mount upgrade and be completely happy.
And then the transmission and engine side mounts...
Much more time consuming to install. After firing up the engine for the first time after the installation, it vibrated ALOT and sounded like a diesel truck. The car was so loud that I could no longer listen to the radio - especially at highway speeds. The engine no longer felt like it was rocking back and forth between shifts- almost like a solid connection. I loved it, in a weird way it sounded like pirate ships at war in my engine bay, haha.
800 km later, the mounts seem to be fully broken in, and it no longer sounds as loud as before. The increased engine noise is now sporty and acceptable. I can listen to my radio again. However, anyone sitting in my car would be able to pick up the distinctive sound of the engine. It's both louder and sportier than most cars, but no one complains about it. There IS more vibration with these mounts, but it also lets you feel the feedback from the front tires alot better as well. Shifting can be executed much faster because the engine settles down from rocking much faster, but your clutch work needs to be better since it's now less forgiving of RPM differences (will feel it more in the form of jolts) when you engage the clutch after shifting. Still sounds a bit like a truck (that's because of the FSI engine), but also a bit like a V8. All of this without have any engine or exhaust mods. I have to make a clip one of these days.