I've been a Google Voice user for 6-7 years. It became more important to me 5 years ago when I moved to the UK and ported my mobile number to GV.
It's not been very pretty. We were thrown a lifeline with the Google Hangouts app taking over for the absolutely-awful Google Voice app.
One of the most frustrating things about GV is that for certain SMS providers, it fails the "is this a USA number test" or "can we SMS to it" test (it's unclear which), thus making it not work with my USA bank accounts, and I can't register for Lyft, for example.
I wish they'd fix this, but what I really wish is that they'd make it a real product, make it cost a few bucks a month, and have a team working on it.
I was actually quite annoyed by the cheeky little "tee hee it's been 5 years + plus emoji" talking about their total lack of updates (both software, and well, actual communication around the service). It just comes across as contempt for the customer. Doubly so when they then throw everything into confusion at the end of the post by hinting that Hangouts may or may not be the future, and perhaps we should switch back?
Are there any good alternatives? What I need is to be able to receive texts from within the USA, be able to access via mobile app and the web, and have voicemail service.