Combined board and stick burrs can be a lot of fun and display well when made with acrylic. Band Cube is one of the best such exmaples I've seen! Constructed with fine hardwoods and precision laser cut acrylic, it really does look great and will nicely compliment the other "gem" type puzzles I've made in the past. With a level 5.8.2 solution, it's moderately difficult.
Construction of this puzzle is excellent, with a precise fit. This puzzle is shipped assembled.