This is perfect for mounting photos on both sides. Heavy enough to support them when put in a sheet protector but not so heavy that it takes up more space in the binder.
We printed our own prom invitations. We cut the paper in half. The invitations turned out great and they were not nearly as expensive as the invitations from the prom catalogues.
I tried this particular card stock thinking it might be better quality than a lesser expensive one I had been using. Found it to be no better for my use and about three times the cost.