I'm a heavy user, no BUGS FOR ME - has been pretty solid so far. Works better than iOS 7, faster, less crashes, less reboots, maps are quicker. Some apps do crash but maybe 1 a day at most. It has been a great experience for me. Again, apps load considerably quicker (except those that use metal - they take A LOT longer to load). Zen Garden and BB Racing take at least 30 seconds to load, it seems. Things like eBay, Amazon, Youtube, Maps used to take a while while now open almost instantly. Its insanely great ;-)
This is on the iPad Air.