They just keep getting better and better and are updated very frequently, usually weekly. They get some very good up and comers on the decks and they are usually a techy-minimal sound, sometimes a bit more upbeat and sometimes not. I have noticed that the overall BPM has seemed to go up a bit in the more recent mixes and a few "fun" mixes that wouldn't fit in with the older stuff are showing up more frequently as well.
Too bad you cannot still download some of the earlier casts, as they need to be in any music library.
I especially liked the more recent Jeremy Caulfield and Ben Klock (which is the most recent) mixes. Great stuff!!
if you can find the Stephan Bodzin mix anywhere out there.....DOWNLOAD IT!!! A great piece of work to say the least.