Wheel bearings.

So I was pushing the 10r around and noticed it wasn't free wheeling as well as I would t want. So I am thinking of changing the bearings across both bikes and wheel sets.
The question is has anyone tried ceramic bearings. Worth the extra dosh? Notice any difference?
Any recommendations for standard style bearings?
The question is has anyone tried ceramic bearings. Worth the extra dosh? Notice any difference?
Any recommendations for standard style bearings?