Vodil

I am thinking of exchaning my phone-specific cradle for the Bluetooth MHI head so I can switch phones. I was wondering what experiences people have had with this.

I don't need full functionality, but I would like the address book to work and the handsfree to work.

I just got a Sony-Ericsson M506 (which is GSM & 3G) for international compatibility and they don't make a cradle for it and I hate having to switch the SIM card when I am in traveling vs. in the car. (Wish I could clone the SIM card, sigh.)

Pros? Cons? Alternative? Comments welcome. TIA