« Reply #4 on: 02 July 2012, 01:11 »
Have been using one for a while now and it works on my 2003 MK4, using it with an Android app called OBDscan to monitor MAF G/S and fuel trims. Does have a bit of lag but readings are the same as VCDS and a lot more accurate than Torque.
Handy to have in the car but wouldn't rely on it for logging.

Logged
2003 1.8T GTI 180 - APR Stage I, S2000 Filter, R-Tech Supersize TIP, Bilstein B12 Suspension, 18" OZ Superleggera, Recaro Heated Leathers, US Spec Rear Lights, N249/SAI/PCV Delete
1.8T AUQ - 241bhp & 286 ft-lb
R-Tech Map, Forge FMIC, SFS Oversized TIP, Ported Manifold, Milltek Turboback non res exhaust, Forge 007p, N249 & N112 delete, SAI delete, S2000 Air Filter, Sachs clutch & Lightweight Flywheel