I got a mini of this in my Mecca Beauty Loop Box and I really like it. Prior to using it, I didn't use any sort of eyeshadow primer (sometimes a bit of concealer) but it definitely helped keep my shadow in place.
I have hooded eyes so creasing is an issue especially when I do more editorial or bold looks and I found this primer to keep it from creasing for the whole day of wear.
It's quite hard to remove in my opinion, it takes me a lot longer than when I don't wear primer and it's hard not to pull my eyelid when removing.
I do think that the full size is quite pricey, so I don't use it for everyday simple looks, it feels like a waste. I'd still like to find a cheaper alternative to compare and I'm sure there's many out there, but overall I do think this is a very good primer.