Have been using for about 4 months now, so I think it's closer to say a year than a month (12/3 vs 1*4). Tutanota fits my bill, and I like it's minimal design and cheap pricing. However I would be happier to pay more and let them know that as often as I can.
- Clean, user friendly UI
- Encrypted email (aka yes you can talk with your ProtonMail buddies)
- Open source web client
- Cheap as!
- They're seriously undercharging (1€ / month for this kind of service seems unsustainable)
- No desktop interface
- No Card/CalDav support