So I upgraded my Gmail at home over the weekend, and it was fine, then I came back to work and I still have the new verision -- except that it really doesn't work in my old version of IE.
I don't see an option to change it back, so I guess I'm stuck and I won't be able to monitor my email at work anymore. I'm not missing much, but it was nice to be able to do that because otherwise it gets bogged down really quickly. (I'm on a lot of lists for sales and coupons. I weed them out regularly, and unsubscribe from ones that are no longer useful for me, but I still get a bunch every day.)
Other than that, I find it to be ... okay.
I don't like that I can't see all of my labels anymore, and that's really the only new feature that I'm going to have trouble adjusting to. I don't see what the benefit is to having larger spaces in the listings themselves, except that I can't see as much on the screen, but it's not something I can't live with.