I got my Jeff mold the other day, and got a chance to use it today. It is AWESOME.Very easy to assemble and ver good insruction on un-assembling and cutting. Everything fits so snug, and there is no way you are gonna have a leak.I got the log mold and am very impressed with it. I plan to get another, but thinking about a slab. Oh, and Jeff is great to work with. He keeps you informed on what is going on until it reaches your house. If you don't have one of these, I recommend it highly. You won't be dissapointed.