Has anyone used Appy Couple? My fiancé and I want to send one paper STD/ invitation a year in advance (destination-ish wedding), and thought this website/app would help to replace all that extra stationery. Thoughts? Is it okay to just send the invitation earlier and include website/app info.? The website/app will have accommodation, direction, etc. info. AND the ability to RSVP. Please share your thoughts!