Has anyone tried one of these yet?

http://www.superchips.com/product.ph...mk=581&msg=%2B

 

I had one for about a month, had to send it back to get my money back. At high rpm's I started getting alot of spark knock. I called super chips they said they had to much timing built in to the program they told me to send it back and they would fix it. I decided to just get my money back, I will going with a xcalibrator 2 in a couple months

 

Also, I am not sure if the superchips unit does data logging or supports updates from the internet. That is why your best bet is to go with Diablo or SCT, I hear SCT is slightly better and more widely accepted at performance shops nationwide.

I'm suprised by the price too, SCT and Diablo units are $400.