I've used just about every phone on the market and the weak link is always battery life... other than the Note Series most phone can barely give me 8-12 Hrs Battery Life.
Been using a Z30 for about one month now and this is definitely the phone for me. Often times I can easily get 2 days from one charge and to me that is Key, The Z30 is just a straight up phone without all the gimmics that other phones have, nothing is running and eating battery, Since I'm using the Z30 I have no desire to even try out other phones..
The Z30 is Hands down the Best BlackBerry to Date and in My Opinion is far better than most iOS or Android Devices, Plus BB10 is far more robust than iOS and Android.
Screen shot below shows a typical battery cycle, 27hrs + 3hrs Remaining before the battery dies.