A few minor things were more difficult than they probably should have been, and there were (and still are) problems with a couple feeds, but overall it was a smooth transfer. I reordered some feeds and changed things around from my previous setup but didn’t alter the order too much.
I really like how in Gregarius you have to mark specific items or feeds as read, otherwise it leaves them unread. This means that if you glance at something, but then move on to something else, it doesn’t get marked as read (a wonderful Bloglines “feature” that I won’t miss). Also, you can control how many feed items appear on a “page”, so if you don’t want to be hit with 100+ unread items all at once you don’t have to.
There’s a few UI additions or changes I’d make, but I’m not sure how much time I want to devote to tweaking this, as I’m very happy with the default.