Well done!
The jigsaw on QV at Christmas was well positioned at the top of the atrium, to the side, such that basically everyone would pass it at some point. I placed a couple of pieces for old times sake.
On QM2, it's somewhere many people will never find, which is a shame!
The last jigsaw I completed was about ten years ago, and it was the 1968 QE2 one, I maybe should do more as a means to relax after a frantic day full of electronics and screens.