This is an incredible application. I've used commercial products of this type for years, am familiar with most of them, and migrated to this one for Monday morning this week. In the week since, I've worked literally hundreds of items (I run HR systems operations for a U.S. Federal agency with dozens of facilities around the world), and use this application as the core of my operations management as I did its predecessors. It is clearly the best of the lot. It has the highest information density (most data in the least space) I've seen--and doesn't seem to slow down with volume of data, at least so far. I'm tracking numerous projects and contexts with it, and it's done very well for me. I had tested it over the last couple of weeks and had data disappear on me, but the (near) daily updates have apparently taken care of that, as I've lost nothing since (I back up regularly regardless).
I have top notch developers of my own, but I can't imagine how IGTD's developer has the time to do the incredible amount of work each of these versions entails. How many people are working on this thing, anyhow?
One added feature I'd love to see given the fact that I track not only my own work but tasks I assign others in this is a category for Assigned To, so I could sort by Context, Project, or Assigned To. It would make this a good management tool as well as personal task tracker then. I write a PDF of the completed items at the end of the week to archive separately as completed actions, so it would be helpful there to have a category for Assigned To as well. I'd also like to have the option to be able to archive structured data (say a week's worth of completed tasks) similarly in the event that I needed to retrieve information on something done in past months or years though, since I expect to be using this application for years to come. That way I could delete them and not eventually clog the database. If they were accessible separately (even as text, and not in the regular IGTD DB), that would be best as I could put a retrieved item next to current status on the screen.
A truly exceptional product by an exceptionally talented, productive, and responsive developer. This is the kind of software that literally drops Window users' jaws, and makes it a joy to be using a Mac.