I've got it, and I love it - when it works!
To be honest its great most of the time, but occasionally it does drop out. However, I managed to narrow this down to something to do with the phonebook! (there was another thread on here a while back that spoke of this).
To stop it dropping out, I've found that deleting the whole phonebook and then doing a restore from memory stick cures it every time. Bizarre I know, but it has worked every time.
I use the bluetooth every day (many calls every day) and I'd say it drops out about 1 day in 10 - then I have to do the phonebook thingy to get it solid again.
This suggests to me that its something to do with the handsets?
I use both Sony Ericsson K750i and K800i with it so new handsets do work.
Anyone else tried the phonebook erase/restore to cure the dropping out?