I love that in only seconds you can have an account up with no password required! It also has great integrations to other services like Dropbox or Google Drive for easy backup/storage options as well (but maybe it doesn't need this because its free). Not really anything negative about using proptn mail so far but just keep all my emails safe by being able encrypt them before sending out via their secure servers around Europe - UK etc.. Also allows me access anywhere without needing internet connection if needed when travelling especially whilst living abroad- saves loads!! I have been using proton mail for about a year now and i love it. All my emails are 100% secure and encrypted. The only thing that i dislike about proton mail is that there is no desktop client where you can download your messages and folders from or sync with other devices. If you want to get messages that are 100% secured then this is the way to go. I am 100% secure with my emails because my messages are totally encrypted and protected.