Very simple process, just plug in the OBD2 port and the unit powers up - since the Mountune MP275 is CARB legal it comes with one pre-programmed tune (that's it).
You follow the on-screen steps, and the ECU load takes about 4-5 minutes - be sure to have a good charge on your battery - they even recommend turning off the headlights or use a battery charger - because if your power dies mid-program - you get to buy a new expensive ECU (yikes!) Well, no drama for us last night as it programmed just fine :)
The tuner even comes with a Mountune badge, not sure if we'll mount it yet or not - definitely too cold right now...
So - you probably want to know impressions and have me stop blabbering LOL.
After filling up with California 91 Octane (blah) - I took it for a spin. Now I see why everyone with a tuned ECU talks about traction issues! Holy crap the car has a ton more power, and most likely I'll need more stuff suspension wise to keep this thing planted! LOL
The car comes up to speed VERY quickly now, it's a fantastic upgrade - highly recommended.
Definitely 2 thumbs up!