Have one. Been running a nismotronic on my gtir for quite a while now. Best daughterboard I have used so far. I've used Calum basic, and Nistune.
I'm running a b13 ecu with a nismotronic board running a GTIR tune on 560 injectors and an e60 maf. I literally plugged everything in, set it up in the software, flashed the daughterboard and It started first try without adjusting K values or any of that crap. Obviously It needed tuning afterwards but I've never been able to turn key a setup with new injectors or MAF like with the nismotronic.
They are releasing a new update soon that will have everything you could ever want from an ecu for much cheaper that a standalone. I currently use the launch control that comes with it and It's very effective. It also comes with an input output box/interface that lets you unput just about any 0-5v signal INTO the ecu for processing. You can use that to set up all kinds of cool sensors and features on the ecu. It also lets you program the outputs that are not in use so that you can control relays etc. For example, NOS, VVL, Water/Meth, warning/shift lights, pretty much anything you can think of. It has onboard data logging INCLUDING logging any of the sensors that you connect using the external in/out box so you can log what you would normally see on your gauges.
To top it off, they are the most helpful guys ever.