I like it, but I think if I'd sent out save the dates via SMS for my wedding I'd have been sleeping alone for quite a while.
It could have been that I wasn't using it right, but I didn't have the time to troubleshoot. We ended up printing a bunch of cards at FedEx and addressing and sending them by hand. Everything worked smoothly.
Better to use an Oh By Code, which doesn't need a reader and can be written/read by humans:
I think what he means is a wedding is a symbolic event that should be mirrored in all the small details, from the hand written card, to the ring, etc, etc... So ya think about it.