This kit is pricey.. but it is fantastic. I have only tried one stamp. Making an alphabet from their included negatives. The instructions suggested you make one of theirs to before making stamps from your own images.
Other than the box being flimsy. OK, that's being a bit nice. My box keeps falling apart. But, not a big deal in the grand scheme of things. My only other complaint is that the polymer is SMELLY!!
The instructions are pretty straight forward. The process is simple to follow and takes about 20 minutes from start to finish. I'm sure there is a learning curve- but a small one at that.
The biggest struggle I had was with getting my lamp to adjust to the suggested height above the polymer packet that makes the stamps.
So far, I would give this a definite A+.