I tried the custom one too. I could not figure out how to size the blocks easily. I would select one and then you have to shift+drag to size to insert it. Ok, that's fine... but how about some help in sizing it to 12"? I had to really, really zoom in, select the block, and pull it to 12" square by using the rulers along the edge.
I know it is probably a great program and I'm just complaining because I don't know it. It just seems to be way more complicated than it needs to be to figure out how to do something. Why can't I right click on a block, or something as simple as that, and tell it the block is 12" square, or otherwise select the dimensions?
Grrrrrrr....