Just small enough, crazy performance and incredible battery life.
Sony really had attention to detail on this phone in my opinion. The battery life without using stamina mode with wifi and bluetooth enabled would last me about 3 days on average with moderate use. With location services I noticed the battery drained significantly faster which is typical for most smart phones. The phone performs incredibly fast without skipping a beat, the camera is amazing and Im impressed at the UI's stability. I notice that sony does not have near as much bloatwear as samsung with it's stock OS. In fact I have no interest in using a custom ROM since the stock sony rom is so good. I have no complaints about this phone and I am really impressed on how good of shape the used phone was when I got it. It still looks almost new. I would recommend this phone to anyone who is sick of Samsung's excessive software features that bog down a phone's battery life and performance. Definitely a different experience than samsung (my previous 2 phones were samsung s4 mini and s5).
Very fast and very smooth. The Samsung battery pack had a lot of watts and it made to the phone go crazy until I switched but other then that it works perfectly fine.