AnandTech reviews Android 5.0 Lollipop, and concludes:
I think Google really hit the nail on the head with Android Lollipop. It evokes the same sort of feeling that the release of iOS 7 did, without some of the negative experiences that followed. Getting a brand new interface is always exciting, as it can dramatically change how it feels to use your phone. Moving from KitKat to Lollipop still provides you with a familiar Android experience, but it almost feels like getting a brand new phone in a way. There’s a brand new UI, and big improvements to performance. But unlike the upgrade to iOS 7, Android Lollipop hasn’t plagued my devices with application crashes and other bugs. In fact, I haven’t really noticed any significant bugs at all after upgrading to Lollipop, which says a great deal about the work Google has put into testing to make sure things are stable.
My experience with Android 5.0 Lollipop on my Nexus 5 have been almost entirely positive. It’s still Android, and it won’t magically draw people away from iOS, but as a whole, it’s a huge leap forward over what came before.
Google is getting better at design faster than Apple is at innovation.
(On my nexus5 lollipop seems faster, the UI more elegant, and the design language mitre intuitive – google not apple)