I'm happy with Bridge contacts.
Why? I don't want to keep three locations synced up.
When I sync my phone and Outlook, BladkBerry Desktop Software has to ask me which change I want to give priority to. So if I've edited a contact on my phone, I need to approve the change for the sync, so I don't inadvertantly replace the contact with the old one.
Now with contacts on the PB, there's one more layer of changes to approve every time I change something and sync it.
If I'm somewhere where I have my PlayBook, I'll have my phone with me too. Makes sense to simply display the contacts over bluetooth rather than sync them all the time.