The only thing I could possibly think, is the Google Voice Integration.
Right now I have my google voice number as the main number that everyone calls. Then my calls forward to my cell and Ooma. I get my voicemails in my email and I get them translated to text.
What more do I get with Ooma Premier? I don't care about pressing buttons on the Ooma device, as I don't really want to touch it. I also don't care about screening callers.
Is there any other must have feature that I should really think about for Premier?
As for other features that you may need, only you can answer that by looking at the list: https://www.ooma.com/premier/features