I had it. The monitor kept popping a comunication code and check engine light and the back lit display went out. They want you to send back and leave your truck without guages for a couple weeks while they fix it. After running it for a while my truck doesn't spool like it use to and there are possibly some issues with my ECM. I have heard several others say there ECM was toast after the Bully Dog programmer. Another guy told me it changed his Vin in the ECM. I can't recomend their product.
Get the TST
Bill