Bought a PowerCommander III
Older serial version but an absolute fleaBay bargain at £2.20
Fitted it no problem, led lights go through knight rider style boot sequence at power on, then sits at the bottom and goes up and down with revs.
I used a USB to serial converter, downloaded the software, and installed their map for stock exhaust.
Only thing I'm unsure about is the buttons, low-mid-high.
How do you know if these are working properly?
When I press each one, there's no direct feedback, thought there'd be a light flash or something. Any advice much appreciated.

 

that's retardedly cheap. Hook me up if you ever see another. All the ones I've seen were real expensive.