I had used Sony Xperia Z2 for 2 years and never faced any problem regarding hanging up and heating up. Infact I consider it one of the best phone . The brand is climbing up the smartphone market because of the quality and features of the smart phones. The phone has all the features I ever needed on my smartphone.
3 GB RAM, 20.7 megapixel camera, 16 gb inbuilt storage that can be expanded to 128 gb, sound quality is definitely good with stereo speakers.
Visually, the phone looks super amazing, display is great and bright with buttery touch.
Overall, it is a chunky phone with stunning features and easy to handle, water proof and amazing looks.