We have had a lot of fun with these boxes. Our team has gotten the hang of it and found a teamwork approach that is fun and effective. With that said, this box seemed much more difficult to us and we ran up against some frustration. We had to resort to looking at hints a couple of times.
I understand there is a balance to find between being too challenging and too simple. If anything, this box seemed to err on the side if being too challenging for our enjoyment.