Although the Ars Technica Review is still expansive, it's still a hard blow to the OS X user of old (starting with Rhapsody DR 2 and then again with OS X Public Beta, as my oldest posts on here show) that the reviews are no longer written by John Siracusa. Of course Mac OS X has long found its way – even the Finder seems more than usable by now, even though it still seems able to forget window sizes and positions – and John did his review work a really, REALLY long time, it's still sad for me.
About El Capitan: I've been enjoying the system since the first developer release and haven't found many problems with it in my everyday use. Office seems to be a bit behind with updates, although both Office 2011 and Office 2016 have seen updates by now, and OS X 10.11.1 should help with Office 2016's crash-syndrome. I don't use Office that often, but it's still the one thing that kept on bugging me (coz I don't often quit open applications and only reboot when an update requires it, basically...).