I have done this, the hardest part was mixing all the cement (I used 'Masons Mix' from Home Depot). I mixed in a tub and it was a serious amount of work. Mixing in the 'roll around' buckets is not much easier. If you have a small cement mixer available it would be much much easier.

Charles

I'd also recommend using a mixing blade that fits on your power drill. Be sure to use a powered drill though, not a cordless. Use a 5 gallon bucket, and be sure to add the water first, then add the dry mix to the water.

I was hoping more people had posted their experience with these molds. I was thinking of trying them too.