For the price (£130 or so at Tescos) a brilliant phone. While the camera's just 8 mp, the rest of the specs are great, and for the first time ever I'm able to get through a day and still have battery left for the next! Despite the beautiful large screen the phone isn't 'big' and cumbersome.
Given it's close association with Google, it's no surprise the phone has the closest integration I've seen with the Android operating system. There's very little bloatware, and Google Now is built right into the home screen. The phone runs KitKat (Android 4.4) but an OTA upgrade to Lolliop is rumoured to be due in February 2015.