Perhaps it's me. But:
The experience of trying to change the battery on my barely-used Flic has me wanting to toss the thing in the trash.
I managed to get it open. I can get it closed without the battery inside. Can't close it WITH the battery inside.
I'd already ordered another, initially thinking the batteries weren't replaceable. And, as it turns out, they basically aren't.
I'm not sure what sort of petite-handed people you had testing usability of this aspect, but it needs a lot more work.
If the battery on my next Flic lasts less than 6 months (no, I don't use it for games), it'll be my last one.