They have been sitting in the understairs cupboard for months now while we decided on the pictures and orientation of each one.
This was something I saw in a bar in London quite a few years ago. That was all different frame shapes and sizes though and I always wanted to do it in the house. We've gone for a travel theme initially, though I suspect this will change over time.
Overall I'm happy with how it worked out, may even add an additional row of pictures below at a later stage.