Having now tried the Mooncup UK, the DivaCup and the Keeper Moon Cup- I have to say that I much prefer the Mooncup UK.
The DivaCup was nice but too long for my anatomy. I had to use a sterilized straight pin to finish poking the holes in the Keeper Moon Cup and it still tries to suction itself to my cervix. It is a softer silicone and it just doesn't "pop" open easily like the Mooncup UK.
I'm going to give the Keeper Moon Cup another chance next month but so far I much prefer the UK cup.