Has anyone ordered invites from costco/einvite.com??

I'm thinking about ordering invitations from costco and I was wondering if anyone had any advice, difficulty, etc? I know you can change the wording right there on the website, but do they send you another proof or is that the final proof and they print it right from that? There was one thing I wanted to change, but I'm unable to do it from the website, and wondered if you can speak to someone to make changes? If anyone has adivce, it would be greatly appreciated it! TIA!!

Thank you! I know I've read on here that other girls have ordered invites from there. I don't know where they are now!?