For all the problems Google+ had, the one that irked me the most was not being all to merge/linked Google accounts. I had a gmail account and a Google Apps for Work account. Every time I would try to associate the 2nd email, I would get "is already associated with another Google Account" as the error. Even though I deleted the Google+ account on the 2nd email. Then somehow I would created a Google+ account again.

I just as soon forget about it, but I'd like to have the google voice messages go to the Google Apps for Work email.