Since I have a part-time 'business' (really more like a hobby at this point) involving fixing up MKIV instrument clusters and reselling them, VagTacho or similar (VAG Commander, VAGdashCOM, VAG EEPROM Programmer, etc.) is a necessity. However there are things that VCDS doesn't do, such as pulling the SKC from an instrument cluster, changing the odometer of a used cluster, reading/writing bytes in the CCM, retrieving a used radio's Safe code, etc. So I've been a happy VCDS user since buying my Golf in 2003 (it had 65000 miles on it so it conveniently needed an immediate timing belt replacement, hence needing VCDS - though it was named VAG-COM way back then).
