This is the original money maze from Hawking's Bazaar.
It's well-made and feels solid in your hand.
The compartment inside is easily big enough for a big stack of notes, a pile of pound coins, or whatever else you can fit through the hole. The unit itself is probably about 50% bigger than a rubik's cube.
The maze itself is a little tricky to solve. Took about 15 minutes of my undivided attention. However, the solution is easily committed to memory, so I would suggest that this gift will only act as maze once or twice for the recipient, and nothing more than a fiddly money box after it's solved.
This is an ideal way to make the gift of money/vouchers a little more exciting. Will keep the recipient (and the spectators) amused on xmas morning I'm sure.
I'm glad I bought mine, and I wholeheartedly recommend this toy.