well I can't say its a whole new ride now, but it did put a bit of pep back into the engine I find.
You can read GoJeep's site about numbers and such, for myself I have all new exhuast from headers back, K&N intake which helps and will be boring my TB in a few weeks which will add a bit too I understand.
I got my intake for less than $200 to my door, and bolted it in myself in a few hours one afternoon, if it adds a bit better milege (I make long trips every other weekend) I figure it will pay for itself soon enough, and if not it just looks nice under the hood.
If you haven't gotten it yet, I would say go for it, yes I noticed a difference, nothing crazy but there is more pep in this new setup than before it.