So I had a W4M tune using the old SCT handheld with my previous 06 YD and it worked great. When it came time to tune the new truck, I checked around to see what else was out there, but it looked like Wait4Me was the only one that met my basic requirements. I don't require much; I just wanted a custom tune to clean up a few "rough" spots in the factory tuning and remove/increase the 98mph speed limiter. And maybe a bit more HP to keep things interesting. It's a daily driver, not a race car! And... most important, it needed to be a handheld. Well wouldn't ya know it, SCT apparently just released the new GM Xcalibrator X3 for the new trucks that is both able to tune the ECU (Engine) and TCU (Trans). Jesse worked with them to help develop it so he got the first batch of these units in. So I'm not sure if other tuners have access to them or not. W4M even claims it's invisible to GM that's it's been tuned. Who knows. Don't really care. So, on to the handheld. It's pretty slick looking, much better than the last SCT I had on my 06 YD. It's more responsive, better design for the buttons, and it's backlit. It includes a USB cable, instructions on CD, and a plastic chrome SCT badge (No, I'm not going to put that on). The tuning took somewhat longer than usual, I believe around 10-15 minutes. Most likely because it was tuning both the ECU and TCU, which you can clearly see during the programming process. The old tuner took about 10 minutes, but it only had to flash the PCM. It also checks/clears DTC's as expected. Otherwise it's a pretty standard unit and tuning process. Just plug 'n play. I requested the Performance/Mileage tune, "Race" or Max Performance tune, and a Towing tune. You can request 3 seperate custom tunes of your choice, any way you want them. Naturally I loaded the Mileage tune since this is a daily driver and is probably the only one I'll ever use. Went for a drive and it's exactly what I wanted. Shift firmness slightly more firm than stock, improved shifting, raised shift points, more power across the entire RPM band, smoother power delivery, increased speed limiter, etc. Basically all of the good stuff you'd expect from a custom tune. Total cost was $410 shipped. Yeah, it's a bit pricey, but that was just for the handheld only; they didn't charge me for the tuning. It's a "promotional" thing since they're new. Yep, that's it. It like it. Enjoy!