Read about Unichip here.
http://www.matrixowners.com/forum/viewtopic.php?t=18844
I guess you can contact Jack at Unichip for purchase.
There was a group buy and it was going for $675.
I got mine used for $499.
Try to find a used one, I think there are still ppl selling.
I have AEM CAI, TRD Quick Shifter, and Unichip and I ran a 15.141 @ 95.40mph in the 1/4 mile.
I ran a total of 8 runs and times were b/t 15.1 and 15.3.
Ran w/ OEM 16s and removed rear seats/interior/spare tire.
I know removing rear seats/interior is kinda 'cheating', but I did set out to get the best 1/4 mile time.
So far I haven't seen anyone w/ the same set up but w/o Unichip hit 15.1 yet.
So I would have to say that my Unichip works and I'm loving it.
I can land in lift from 1st to 2nd to 3rd to 4th, all day long!!