(update: I should have prefaced with: "Nice post.")

I took the plunge two weekends back. I haven't used any of the sophisticated pieces yet (and I'm just running Mouse for now so I can know when I hit the "wall" between the two). What impresses me the most is not how clean the object system is but that it is so easy and wraps up other object classes so well that it encourages its use in plain old short programs and maybe even one-offs. Don't know how much I'll be using it but I love it so far and probably only using 20% of the features. I think Dave Roslky just expanded the docs a couple days ago too; I haven't had a chance to check. Very cool.