So far, I've been using my new FemmyCycle Low Cervix for three days, and I'm really satisfied with it! I had a couple of incidents, but they clearly meant something went wrong upon insertion. After that, I reinserted the cup and wore it without any leaks for the rest of the day. I also slept through two nights without any leaks.
I expected some learning curve with this cup due to its unusual shape and absence of holes. My first attempts were ridiculous: I could not make the cup unfold inside me! I tried to insert it a few times using the C-fold, and then just put it off in frustration. Later, I read some more reviews and tips and tried the punch-down fold. This worked better. With some more practice, I got to inserting the FemmyCycle as quickly as the LadyCup. I stick with the punch-down fold with the opening of the fold towards my rectum. With this, it opens fairly well and catches enough air inside, so even though the cup is not fully open, I don't feel any suction.
I hope I'll stay as happy with my new cup as I am now. I'll post an update if something changes.