So, my first days and weeks with
eProductivity are gone and here are some impressions:
The Installation gave some hickups because of some errors while replacing the design, but replacing the design on the server (convert -u ) fixed that in the end. Could be related to my frequent changes (ONTF ME releases, Mail8, etc) of the template and having editor access normaly. But this let my discover some really great thing: the support done by the eProductivity Team. The response times to my installation problems were hours and I don't even pay for the license! Thanks to Ian Armstrong and Eric Mack for this great service!

The menu entry "Send Feedback" (opens a dialog, which asks some basic questions -> bug, feature requests, general feedback) is a great idea for such a product! (They might have some different thoughts after my frequent uses of them, though :-) ) Finally some easy way to get in contact with the developers. At least with me it encouraged me to send small things, which I noticed and wouldn't normally bother about, back to the developers. There is also the eProductivty ideajam which I discovered after some nagging from Eric Mack.
Learning my way around the application was easy after the "tutorial" but costumizing to to my needs was an interesting experience: most of my Todos are "@Computer" and after adding my first todos I only added to that context. I finaly settled on several "roles", which I have, when using the computer (as student, as member of my student organisation, as notes programmer), which at least spread that out a bit and made my todos more organiced, at least to me.
I also started using it as a project management tool for my small projects (so no time plans, only splitting it up into projects). This feels great because finally I've found some way to bring my planing together with my computer and in a way, which does feel natural and not "getting in the way". Before that was either some paper based planning or email/notepad/mindmanger based docs, which got old after the initial planing. If I only had this when I started my diploma thesis... :-)
I also got to inbox zero for the first time in years (although there were never more than two pages full of mails). Yay!
I'm still not sure if I use eProductivity how it was thought to be: using GTD methodology (I started reading some ressource about it). But the greatest thing which eProductivity did for me after only a week was giving me a
feeling, that I'm in control of my tasks and that I have one system,
where everything comes together. And in the end it is about "getting things done" and that's what this feels like! :-)