Sam. Zietronix. I use a laptop and log boost, AFR, RPM, and MAF voltage every pass. No calibration, accurate as can be for a cheap wideband. If you want to see it in action, yell. You can get a display that shows 4 parameters as well. The dual channel doesnt matter anyway because you need to use it in the downpipe, 02 sensors don't work correctly in a pressurized system (headers under boost).
I installed one of the FAST units on a customers SRT8 and I didnt like it all that much.
A wideband on any high powered car is a must. Things can happen that your are unaware of, fuel filters clog, one pump could die, regulators fail. You need data if you want the car to live.