The shake at idle reduces noticeablely after about a 2 week break in while it settles.
I installed only the front motor mount, and it was noticeable stiffer and had a bit of vibration, which is all but gone.
I still get some wheel hop at the top of 1st and into 2nd, but its not half as bad as stock.
I'd imagine this summer on the warm pavement it will be all but gone.
Definately a must do, and very easy to do mod.