Is this computer any good?

 

I've had an XS modified ECU for 3+ years now. I've used it for both sequential and non-sequential turbo operation. Mine has worked great. A while back I did a dyno session with Air/Fuel monitoring and my AF ratio looked really good (a little on the safe side, of course).

I don't think XS is still supporting/selling this product since they now sell the Power FC. If you do a search on posts by me, you may find more info as I have responded to this question before.

Hope this info helps...