I did a dry run with the medium purple Meluna right away. Everything went very smoothly. I used the punch down fold with it and it opened up right away for me and I was able to remove it with out a problem. I wore it off and on for two days without a problem (minus one incident where I accidentally dropped it in the toilet).
Today is my first dry run using the large red Meluna. I had to work a little harder to get that one to open up in me for some reason. The punch down fold didn't work, I ended up getting it open using the C fold and "stirring" around for a while. I can feel this cup. Maybe it's the prominent grip rings on the bottom, or maybe I'm just not long enough for it. Either way it's not uncomfortable, I can just tell it's there. Maybe it will get better with some practice.
Anyways, I just wanted to share my excitement with you guys! Sorry this is so long!