I invited 130 total and only heard back from 60 of them. With 70 people MIA, I'm getting a little worried. I really don't feel like making 40+ phone calls asking people to RSVP.
The other thing is, I'm doing the online RSVP via e-mail or the webiste RSVP page.
I've heard that the website is not reliable but I also haven't encounter anyone that was having trouble getting the RSVP through to me.