It's working great for me at the moment. I'm only doing emerge -uD system and updating some of my favourite programs. Theres nothing hard to it, you just need to find something to do while it all compiles
I'm getting to an advanced stage in my linux usage so i think i may move over to gentoo in the near future. I will have to wait until i have better internet access though (wireless ftl). Also im currently building a Quad Core System so i think compiling times may be a thing of the past soon
Current Kernel: 2.6.20-sabayon-r3