When received half of the cards had been cut so that the wording on the back was half missing.They sent replacement cards but they didn't arrive in time for the memorial event been held . Disappointed 😔
I recently bought 20 cards in order to cut them in 3 strips and turn them into bookmarks. It was fairly difficult to get the front and back of my bookmarks to line up (I had writing on the back).
The tolerances of their printing are not consistent, even within one card batch (I print 20 at a time and the placement on the cards varies quite a few mm), which can mean that some of my bookmarks are a lot thinner than others, and the printing on the back is not centered, however I don't think this is something that Diamond Photo would have the capacity to fix, so I just deal with it, and I will look at other options in the future for bookmarks. It is good enough for me at the moment though.
The colour has been printed nicely and I prefer the slightly glossy to the matte cards. It would probably be great if you just wanted a simple print done, and don't have anything important near the edges, or try to do anything tricky like I do.