What is the best Google Voice app for iPhone?

What is your favorite Google Voice app for iPhone? GV Connect and GV Mobile look like the best from what I've found so far.

https://itunes.apple.com/us/app/gv-connect-call-sms-client/id347835665?mt=8

https://itunes.apple.com/au/app/gv-mobile-+-for-google-voice/id392608246?mt=8