This is a really good phone even though the battery goes fast. The xperia z does come with a power saver mode that helps with the battery life but besides that it's a really solid phone. It also catches everyone off guard when I go swimming with the phone and stop to text and continue.ProsThe phone charges fast with the stock charger or the Sony "official" dock, not any generic onesThe phone's customization can do whatever you want it to look like if you are good with technology but is simple to use if your not, I made mine to run all the old Pokemon games on the lock screen It has a software that you can install to have your Xperia Z up to date and back up all your messages, contacts, music, files, etc...Has its own small apps that are similar to widgets that can run above other apps, there are many third party apps that you can install to run, I run 2 youtube videos at the same timeThe Xperia Z comes with great stock apps but you can choose to use others on the Play StoreIt comes with good memory space and is expandable to 64 GB, I completely maxed out mine with music, the phone's 16 GB + 64 GB on a microsd cardCons The battery life sucks, this could have a better battery but it could just be me since im on the phone 24/7Camera could be betterNO GROUP MESSAGING, I really hate this, during school i would be put into group messages for a project or just with friends, if you get this phone be prepared to get every text as a single one per personIt does heat up with constant use, 3 hours plus, this really doesn't matter since I probably put this phone to harder conditions than Sony probably tests the Xperia Z, freezing water and snow in Lake Tahoe, burning hot sun Pasadena, rock climbing at Eaton Canyon, Swimming in Santa Cruz and Santa MonicaOther things you should knowBuy a screen protector and a case, I have never broken a screen or broken a phone but this phone could get a scratch on the glass. I have not dropped my phone but others have and because i had a case and a screen protector i could just replace them and the phone look like new.The speaker also sounds quieter when you come out of the water, this is normal since it just has water that is in the speaker. The speaker only takes a few hours to dry but by the next day it should be back to normal. THE PHONE IS ONLY WATERPROOF WHEN THE FLAPS ARE CLOSED. If you leave these open I really hope you have insurance or be ready to buy a new phone.