I downloaded the Puzzletory mod last night and I think it is a great mod overall. I'm about 3/4 of the way through.
The puzzles I have done so far are very unique from each other with there own distinct flavour and challenge. The puzzles feel challenging yet feel like they can be accomplished. It reminds me of the video game series "The Incredible Machine" which I played alot as a child.
I will try and post again once I complete all the bonus challenges (IF I can complete them all, some of them are pretty hard!)
P.S. I am sure you are aware that one of the levels has an incomplete background (I think level 18?)