I have done many UGears puzzles, but this one is not so hot. Biggest problem is the toothpick axils which break so easily, Ive redone them several times and they just keep breaking. This puzzle needs a design change with better axils.
Fun and simple to build. The trick is to lightly scrape to toothpick axles with the sharp edge of a knife, then sand smooth and wax them before assembly. By slightly reducing the diameter of the axles they're much easier to assemble. I'm going to buy another to make for a gift.