Before you change to Google Voice for voicemail, please note there is no way to make GV pick up on the first ring. If a call 'times out' from your cellphone it will then ring another few times on GV EVEN IF YOU HAVE DO NOT DISTURB ENABLED. With my phone the wait is so long it's impractical to expect callers to hold on for it.

Please understand, I think GV is primarily good but for many of us this 'lack of feature' is a deal breaker.