It usually starts off pretty well, some yogurt gets in the mouth.
Sometimes they use the wrong end....or just their fingers.
There is always a mess.
The suction cups usually fail at some point.
We've had one meltdown (yogurt in the eyes apparently hurts)
But all in all, it hasn't been too bad. Fun, even.
We have work to do though, LOTS of work to do. I'm guessing we'll have this skill mastered by the time they are in middle school. :)