Concrete countertops...anyone with experience on them?

I am contimplating making my own concrete countertops. Does anyone have any experience making them? How about anyone who uses them. Anything good or bad to say about them?

Answers:
They are very sturdy, can be very pretty, much cheaper than marble, and a pain in the *** to keep up.

They either have to be sealed with a urethane type finish or a wax type finish and that finish has to be maintained or they stain.

BUT- the art of concrete countertops is taking off and we are seeing many more styles and uses for them. Check out....

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