I have tried EN tasks and do like the look and feel, and certainly can see its potential. However, its current limited integration with other apps means I have stepped away for now for my day to day tasks. Please see below for my thoughts on what would make EN tasks more useful.
1. EN Task requires two-way synchronisation to external Calendar App (iCal and Google):
if a Due Date and Time is allocated in the EN Task, then in the calendar app it should be created as as a "calendar event" reflecting the Due Date and Time (with a default time of perhaps 30mins, but this should be configurable in EN)
if a Due Date and no time is allocated in the EN Task, then in the calendar app it should be created as a "reminder/task" for the Due Date
if there are multiple "reminder times" allocated in the EN Task, then these should be carried through the synchronisation
once synced into the calendar app, if the reminder/task needs to become an "Event", then the reminder/task (in the calendar app) should be able to be dragged into the calendar to create a "Calendar event" with synchronisation/update back to EN to reflect the change - ie two way synchronisation
similarly, any changes in EN or Calendar App should be appropriately reflected in both apps (EN and Calendar app) - that is, create, delete, update, modify text, embedded links, etc
2. There needs to be the ability to embed an email link into EN Task - I use this a lot to either remind me to respond to an email or set aside time to work on the email subject. This can currently be done in an EN Note so I am surprised it is not available in EN Tasks.
3. It would be very helpful to be able create a recurring task / event in EN Tasks - as per above, this should be able to synced to a Calendar App, with a two way synchronisation capability to create, delete, modify, etc in either EN or the Calendar App.