Yosemite looks real sweet and seems stable so far. I can't install it on my MBP though as I've read that vmware isn't currently working
Oh hai me x
In response to myself above, I've installed 10.10 Yosemite (DP2) on a USB 3.0 stick so I can use it in Retina on my MBP. Absolutely stunning looking operating system. It's a bit sluggish booting from USB, but once rolling, and all necessary apps are in system memory, it's pretty sweet. A fair few spinning beach balls from time to time, but I kind of expected that considering where it's installed. Visually it makes Mavericks look like Windows 95.
Superb. Really freshens up any Mac.