Many of us ADV gang have bought the device to increase lower-end power to our pre-2010 bikes - it's called the Ice II Air. Some really smart dudes in CA, engine computer specialists, built a plug-in play device like the Booster Plug but a far better device and FAR cheaper. It plugs into the air filter sensor and tells the engine it's 20, 10, or 0 degrees colder - you pick. At the offset, the engine runs a little richer providing a really fun response to low end torque and it stops any back firing for us GS guys. Guys on 1150 say it's an incredible difference. On later 1200, it's not as pronounced, but no one has said it was bad - everybody has raved at the torque and fun acceleration difference. My gas mileage has not changed except that I'm having too much fun twisting the wrist too much now!
Anyway - I've loved mine! They were not making any more - but due to high demand made a batch of 30 more. 28 are left. If you're looking for more pep in low end, which us GS guys need off-road and a more spirited throttle - this little guy works great.
In terms of power difference you can immediately see - I ride a big GS Adventure, and even with a full tank of 9 gals, I can pull a wheelie without the clutch.http://www.advrider.com/forums/showthre ... st18994725
Just passing it on!