Bullydog for Jeep JK
The Tuner is well made and instructions are very good. Only downsides are the it only has 4 maps for my Jeep JK, the head unit is small, and then menus are confusing. Overall it does what it says it does and I went from 14 MPG to 17.5 MPG. A pretty good bump for a Jeep. The tire size tool fixed my laggy speedo(-5MPH) back to the correct speed. Overall worth the money, but it needs a little more work like more maps and a little bigger screen.
This thing unleashed the beast
Huge difference in my 4.7 Grand cherokee...woke it up! this thing runs and gained 2 mpg in fuel economy. Only reason I rated ease of installation low was because I haD TO WASTE 15 mins updating it on my pc. for the amount of money I paid it should be pre updated. and its a bit pricey.