More costly, specially after you buy the sensors, but looks to be a much more powerful tool in the long run...
Supported Senors for Logging:
Wideband (Air/Fuel Ratio) Boost/Vacuum(cause turbo) Exhaust Gas Temperature(cause turbo)
Throttle Position Ethanol Percentage (A sensor that actually measures, not just a calculation)
0-5 Volt Sensors
Air/Fluid Temperature
Oil/Fuel Pressure (With a return system you lose your factory fuel pressure)