I did the revshift motor mounts this weekend while I was installing some Kooks Long tubes. I went with the blues. The stock mounts looked fine and the engine didn't rock back and forth, even my buddy who is a gm tech said they are fine. When i took them out they were toast, lots of rubber missing and the bolts moved around like a spoon in peanut butter. My car has 110k on the OD and is an '06
The new mounts are great, in fact my favorite thing I have done so far. They made everything so smooth and compared to my old stock mounts they ride so much better. I barley know the engine is on except when stopped then I notice a tiny shimmer sometimes but nothing that I would complain about. They took care of the vibration i would get at low speeds in reverse which I though was the flywheel letting go.
I was worried that because these mounts were poly the added vibrations would be bad as this is my DD. Not the case what so ever. Very glad I did.
Just my 2cents.