Vishnu Stage 1 upgrade

I am seriously considering purchasing a Vishnu Signature Series Stage 1 upgrade for my EVO VIII. This includes a whole new exhaust and a piggy-back ECU. I'm wondering if anyone out there has installed on of these on their car? Does it produce the hp increase they claim? Are they reliable? Is the installation process relatively easy? Thanks for your help!

I highly suggest vishnu. Shiv is a great guy, he's the wrx/miata/evo guru. although i haven't gotten the stage 1 sig. i plan to do so when i obtain my evo. but for now, he's been working on a friends m2/vishnu wrx and its awesome. plain words: BUY IT NOW.

Thanks VF.
I bought the Vishnu right after I posted my message. I am planning on putting my car on the dyno before I install the exhaust to get a baseline and then put on the exhaust and dyno it again to see the improvements. Hopefully they'll be close to the claims on the web site and in the Car & Driver article. I'll let you know how it goes. Get your Evo soon man. These cars are so much fun.