Excellent for collection, not great for solving (to be honest). I love this puzzle as a concept, but pins (usually just one at a time) will fall out if you are not VERY careful. Read the instructions in the description and watch videos about this puzzle if you are unfamiliar with how it must be handled.
However, if a pin falls out, reassembly is tedeous but NOT VERY DIFFICULT. I have reassembled it multiple times and have gotten the hang of it. Just do not lose the pins (they are rather small).
Please remember that this puzzle really shouldn't exist structurally, so the gravity pin mechanism is the best we are going to get. Take a chance! I would not attempt a full solve though.
Lastly, do not attempt more than one or two jumbling moves as the mechanism might temporarily split (which is what causes pins to fall out).
