YEY! Your Prisma arrived! I'm so happy for you! And you're so right about the vertical card slots - it was a bit weird to me too, at first, but now I think it works really, really well. I actually think it's easier to get my cards out of these slots than the normal horizontal slots.
Beautiful! Everything looks so neat in there and it's nice that you can fit your phone in it (even though you won't regularly do it). My Quillon wallet is the sale, I can fit the phone in there but it makes it bulky and stretches it out a little so I don't imagine I'll be doing it often either..