I purchased the PULSAR before I picked up my new RAM and installed it, in a Wal-Mart parking lot, as soon as I got off the lot. I had a 900 mile plus trip home from Dave Smith in Idaho to Northern CA. This is my 1st non GM truck so, I'm not familiar with past RAM tuners. I have used handheld tuners on all of my GM trucks. The PULSAR is very user friendly. The ability to switch between tunes on the fly, with the cruise control +/- buttons, is a great feature. Edge states that the ECU is not flashed and that the tunes remain in their sandwiched module. It took a little effort to adjust the tire size to the MPH. I have the off-raod package with 3.92 gears. I tried the tire manufactures specs and both the speedometer and MPG were off by 5%. I'm not sure if RAM uses the GPS for any calculations like some GM products do? I used a GPS app on my iPhone to adjust the speedometer in. After that the Speedometer and MPG displays are accurate. I'm now consistently spot on the MPH and within 0.5% MPG. I don't have any Dyno comparisons, only seat of the pants comparisons. My seat hasn't been calibrated in a few years but, I took my 2008 Corvette from 379rwhp to 681rwhp in 6 mods. The seat of my pants comparison is mostly off the line with throttle response. The biggest difference I felt was going to the Performance tune. The throttle was very sensitive and I found myself spinning the tires regularly even though it wasn't my intention. The downshifts were very agressive in Performance too. I've found the Economy tune more to my liking in traffic, it's much more smooth. The great thing is it's just a push on the Cruise Control +/- to transition through the tunes. No pulling to the side of the road, just push a steering wheel button regardless of what you're doing. Any gear, any throttle position, and you always know what tune you're in because it's displayed in the very upper/center console display. The edge site claims that they will be adding the ability to store custom tunes in the module. I can't speak for the other tuners available but, I can say I'm very satisfied with the PULSE. On the highway in Eco mode when that knucklehead wants to speed up, when I go to pass, it's 4 quick presses on the - cruise button and it's "See Ya". Once around that knucklehead it's 4 presses of the + and I'm cruising along again. One this to remember IF THE CRUISE CONTROL IS SET YOU CAN"T ADJUST THE TUNE, just touch the brake or manually disengage the cruise control before adjusting the tune.