As V1.0 I found Allo quite fine. Google assistant is so cool answering a lot of questions that you would rather switch to chrome and browse Google search results etc.. About encryption issues, I'm not a CIA agent and I have no problem if they use my data to improve the app utility. That's what AI and machine learning are all about. And please, don't tell me that Facebook or other services don't store your conversations. What is missing is SMS/MMS support and a Desktop client, that's it.