My period will start probably tomorrow or the next day, so the timing of its arrival was very good. Obviously I can't review the performance of the cup until I can really put it to the test, but I done some dry runs already, and must say I'm impressed. I don't have any more trouble getting it to open than I did with my Diva, even though its way softer than the Diva. But I've had three babies, vaginally, so YMMV. I can't spin it around because it's so soft, instead I just have to run a finger all around the outside of it to be sure it's fully open. It's very comfortable to insert and remove--seriously I didn't realize how ouchy cups can be to remove until I tried this one--this doesn't give me any of that pain.
The other surprising thing--with those gigantic holes, I wasn't sure this cup would give any suction at all--but it does. Really well, and you still have to break suction to remove it comfortably. It's so comfy! I just can't feel it at all--after awhile I couldn't feel the Diva either but with this, there was no adjusting to the feel of it--I just couldn't feel it. The stem was more comfortable than the Diva or Mooncup UK stem, but I could feel it slightly, so I cut it down to a little stump, which I can't feel at all.
Overall, if this thing doesn't leak, I'm in love and won't use anything else.