I don't want to rain on anyone's parade, but I think the TDi box is not even close of what they advertise it for.
About 4 months of use, and all I could get was a check engine light - which, true ... it went away after I disconnected the box.
There was no MPG improvement, and no significant throttle response. In fact, I didn't notice any benefit whatsoever.
Total waste of money, and abysmal customer support. One other thing I want to let you know is what I was told by my service adviser: if they see those on a vehicle under warranty, is a sure way to get yours voided. My luck was that once I removed it, the check engine went away at the next restart. No idea why, or what it was, but I am happy I don't have it anymore.

 

Hello - thanks for providing your experience. I’ve decided to explore other tuners.

 

I still may give Bluespark a try if we come to terms on the lease - buy.

 

same. It’s a complete ripoff. Emailed them a few times and didn’t get anywhere. Honestly just gave up and removed it. Seemed like it wasn’t even programmed. I noticed zero difference. The check engine light was there but the Disco needs about 5 reboots to clear a light. Mine went away but still I then took it off and didn’t notice any difference.