I just purchased a 2010 Expedition El, I will be purchasing a tuner for in the near future. I have been running Edge programmers since beta testing one on my F150 when they were first released in about 2002 or 3. Currently running a CTS in my 01 Expedition. For the most part I run it to correct for my gears and tire sizes, and improve transmission performance. I do really like the gauges, especially speed, CHT and trans temp.
I have been looking at the SCT livewire and ITSX, to allow future upgrades to custom tunes. what parameters can be monitored on these devices? I definitely want Trans, temp and CHT especially when towing.