Erik,
I installed a demo not too long ago and found nothing but problems. I found it's workflow and yes, it's gui, not to my liking. It has some good concepts, good ideas, etc. but it doesn't seem well built to me (at least, not enough to be a real player against the others).
I just found some posts on the Notion boards, from a moderator, saying that Notion hasn't been abandoned at all, but that they slowed development while they crank out an ipad app- that they would return to it afterward. With the release of a recent update 3.2, I am hoping that we'll see a Notion4 coming sometime. This could address what some of us have been concerned about. Just a thought anyway...
-Sean