I doubt I'll ever use the in-browser calling. For me, it's much more useful as a call-one/ring-all number. The text messaging and voicemail features aren't too bad either.
I've used Google Voice / Grandcentral for a few years now for in-bound call management and I absolutely love it. I still can't get used to using it for outbound dialing on my Blackberry, I might use dial-out on the laptop but I hate being wedded to a computer when I'm on the phone, it's too difficult to take a bathroom break or get something to eat/drink during a long conference call.
