Anyone try out Android L yet? I've read great reviews about it. This one in particular is really detailed - http://arstechnica.com/gadgets/2014/11/android-5-0-lollipop-thoroughly-reviewed/1/ Of course Material Design looks fantastic. However, I think I'm more stoked about the brand new JVM. Dalvik has been scrapped in favour of ART, which was written from the ground up. The article talks about it in great detail. Many other great improvements as well. I've been a custom ROM kind of guy, so I'll probably flash my S4 whenever there's a ROM/free time.