Last year Christmas ordered a NBT Evo unit to replace my broken unit. Send him defect unit and he would see if he could repair. Bought a full NBT Evo kit with cables, etc.
Micheal Riva has never delivered the ordered parts, returned my unit or refunded me. He promises to do so, but was not even willing to part deliver. Be aware there are more people that have been scammed by Micheal Riva.
I was reffered to Germaniks by carsystems.com.au and he is still listed as a distributor. It all looks legit and perhaps in the past he did honor his agreements, but not anymore.