I have an Sailfish X, but I don't use it anymore. Unfortunately, even the build in apps lack features I want/need, and so in the end I would have to use all the Android apps again.

* The Mail app does not support GPG

* The Chat app does not support any modern XMPP extensions or even group chats (this is because Telepathy does not support it)

* The Calendar has no month view if I remember correctly

But I really wish Sailfish was usable for me, I would prefer to have a "real" Linux distro on my phone.