I ordered a small Juju despite the fact that they're a bit expensive, as they're Australia based and I like their general ethos and attention to detail. Just thought I'd post my thoughts here since there doesn't seem to be as much information on it here as other brands.
I didn't have any trouble inserting and it fits comfortably if I push it high enough (apparently I have a high cervix? Lots of new discoveries here). When I picked it up I was so excited I wanted to try it straight away, so ended up wearing it for the first time to a Pilates class (with a pad for extra insurance) which I realised too late could have been a bad idea with all the flailing and pelvic floor exercises... but it actually worked perfectly, didn't feel it at all and no leaks when I checked afterwards. Very excited to have it for exercising, as I always feel self-conscious and uncomfortable exercising with a pad. Whilst sleeping was fine too. Removal was a lot trickier - it moved up a lot for me and for a minute I couldn't find it and had a panicked moment thinking of Manny absorbing the Little Book of Calm... Bearing down helps though. I found the grips at the base not very grippy (though I can't compare this with any other brands as it's the only one I've tried - maybe they're all like that), so currently it's taking me a while to get it out. There is too much suction to remove it by the little tail thing, it has to be by the base of the cup. I suppose this is something that you get the hang of eventually? I'm pleased with the lack of mess when removing it though, for some reason I was expecting to get blood everywhere but it's actually very clean. I haven't used it at my heaviest flow yet, but I think it should last me through the work day or whilst sleeping fine. The packaging is gorgeous and I'm hanging onto the box because I love the design and how it folds out!
It's definitely pricier than other options, especially if you're not in Australia, but from my experience so far as a newbie I'd recommend it :) I'm 27 / not a virgin / no kids / need to ask the doctor to use the small thingammy in pap smears, if that helps at all.