I quite convinced not to pick Telephone Module for PCM (666) for my Cayman S for many reasons:

1) I use my mobile as a PDA
2) lots of SMS use, I have 2 SIM cards carrying the same number. So once I activate the one on the PCM, what happens to my new SMS?
3) The cabin would be noisy for handsfree use based on my experience with my current Audi TT Coupe
4) no mechanism for updating the address book on the PCM other than manual entry

If any of you think that any of the above is not right/true, please let me know before system close up for final specs.