Yesterday, I installed LMDE 64bit rc XFCE, after wiping out my approx 800 MB updated original install, and I have to say that I'm quite impressed. I installed the latest Nvidia driver for my desktop using sgfxi and it is running very well.
I like the new method of updating and although I realze that it is "experimental", I find that it has been easy to set up and so far, works like it should.
My only sticking point has been the menu opening delay after the initial right click. This is certainly minor and after that initial opening, works like it should.
I know that I will be placing LMDE on a few boxes in the future.