I love it except one thing - if I let it set for too long, the air forms into one bubble. The instruction for dealing with a large air bubble seems overly complicated, involving removing the sand etc. It talks about a regulator, which I have no idea what that is (I had a syringe as part of my kit) I did find that by sloshing the painting back and forth, I can break up the air bubble, but knowing when to stop breaking the bubbles into smaller bubbles is difficult, as it drastically alters how ...