I have the Heli Hestra lobster claws. I loved them last season. Looking at them now, they are really dirty (I got white/black). The leather does get wet, but I didn't run into a problem of it leaking through. They also aren't the warmest gloves on the block. I'd use an extra liner with it for colder days.
I do have to note that I did not take care of them. They come with this leather balm and you're supposed to maintain them regularly. If you're lazy like me, this might be a problem considering the price tag. Who knows, maybe I can restore them to nicer condition if I use that lotion lol.
Oh, and it's definitely over the sleeve design. One of my jackets' sleeves won't fit over the cuff of the Hestras. Looks very silly, but hey, it keeps all the snow out.
Recommended only if you're up to the maintenance. High quality gloves so technically you should be maintaining it nicely.