If you do not have a buttkicker get one, you will not be disappointed.
Have been running mine for a few weeks and did not really notice how much deference it makes. The other day I forgot to turn it on, I was playing and something just did not feel right, I just could not get into the game. Then I twigged and turned it on. My game was back
One thing I will say buy another y splitter, you only get one but then you get rumble from the left or right not both ( 360 ) so it was a little bit of work to make it run as I wanted but well worth it.

