Really interesting and clever little building blocks. They're fun to build and help break up a plain table and add a very industrial sci-fi look.
My complaints with the set are:
1) It's not clear how the stacking brackets are supposed to be used. There are no instructions for them and no pictures showing them in use (that I could see).
2) Extra objective markers and brackets are stuck onto the same page as some of the main building blocks - which means you're going to end up with a lot of extra props and accesories that you don't really need. I would have liked to see all those optionall things on their own page so that when I go to print lots of multiple blocks I don't waste ink on things I don't need repeats of.
Other than those things I thought it was a great set.