No, but I have used almost all it's open source components. Highlights are:
Apache now handles multiple connections as well as nginx (but still uses more RAM)
Bind, bash and Heimdal have numerous security fixes, one of them critical (but also rare and obscure).
Weird SNI issues in curl are fixed.
Dovecot is exactly the same as it always was as far as anyone can tell, but the config files changed
File has fixed the bug where it detects win32 icons as images (rather than extracting the icon), and burns all your RAM, until even your swap gives up. Also detects more of the obscure filetypes. Also plays better with the semantic desktop (if you have one in iOS, I don't know either way).
Nano updated for no particular reason, and replaced your tabs with spaces until you re-add your own config file.
openssh now uses bigger keys. This is a security fix for what won't be a security flaw for another couple of years.
A whole bunch of bugfixes in X11, though it breaks a few legacy graphics cards. The biggest impact is composting is less expensive, and your graphics card will run a tad cooler (and use slightly less electricity).
In short, assuming the bits we can't see are in a similar vain to the bits we can see, it's just a security and bugfix release.