There was a better throttle response and MPG. There was no lag when you got on the thottle. I did feel a gain and for the $108 I spent on it originally, I thought it was worth it.

 

I still have the TB spacer for sale and the main difference between the one I have and the one you linked off of ebay, is the groves. The one on ebay barley will affect the direction of the air flowing into the intake manafold. The airaid one directs air in the deep spiral groves on the sides of the spaces. When you get the air going around and around on the outer area of the opening, it causes a vortex in the middle, that is when you get the swirl that gives the better air fuel mixture... It is definately not a mind blowing increase, but is does give better throttle response and less lag...