I easily belay the Grigri 2 left handed. 15 years ago a petal rep showed me a slightly different technique that works perfectly for grigri 1 and i adapted quickly to gen 2 last year. pm me and I will send you more info.
Btw I use the Grigri in a normal position ( not upside down) and I am female so switching to Gen2 was no big deal. If you have larger hands the smaller size could be a slight issue.
I can't believe people are so helpless. I am left handed but I live in a right handed world. I can swing a golf club and shoot a rifle right handed. I certainly belay right handed. All this hand wringing is stupid. Stop shopping at the leftorium and take some initiative to learn how to live.
I spent a little time fighting with it, but eventually just learned to belay right-handed with the GriGri.
I'm another left hander. Just learn to use the Grigri, it's not hard, given that we should to be able to belay to a basic standard with both hands anyway.
I'm still in two minds about the two versions. I've not been sport climbing much since I got my GriGri 2, but my first impression are that the smaller size will probably take a bit of getting used to before everything is really slick.
There's alot of good advice in this thread about belaying left handed with any device- i've taught many people to belay with the grigri left handed and its almost never an issue. it feels weird for them for one, maybe two sessions, and then its fine.
that said, keep an eye out for the Edelrid Mega and Micro Jul coming out this March or April- $35, 60g (half the weight and almost half the price of the Mammut Smarts), locking assist belay device. Looks and behaves like an ATC except when you fall, then it does the locking assist thing. Pretty neat little device.