El Capitan..

Is awesome!. Being able to boot camp from an ISO means that (for me anyway) it makes Parallels useless for now.

Loving it so far - are you?

I've been using the Beta and the beta (GM) and it's been excellent. It does seem faster than Yosemite, although that was fast IMO.
I've had no incompatibility problems so back-up and update, there's no reason not to.

I have had it from initial Beta. It was quite laggy back then, going from sleep mode to active reminded me of the good old Windows days, but now it's is faster than ever

Very fast on both my 16GB iMac and MacBook Pro systems. The MBP is especially fast as it has an SSD.

Have been running el Capitan since early beta and it has been remarkably stable.

Definite sense of Teh Snappeh with it. A few applications had to be updated, but most were ready to roll.

The only bit that sucks for me is that I went to do an internet recovery (which before was Mavericks and then Yosemite) but now it only shows El Capitan

RIP Mavericks - you will be missed from internet recovery :/