Its a good user as per its user friendly abilities
Regarding satisfaction it provides a huge memory space required by any user.
Its capabilities are firmly increased due to some modifications from the earlier limits of the previous models.
Regarding efficiency and overheating problems , it just beats anything out of the ordinary and has a higher capacity to withstand full functionalities as I have played games like COD BO2 without any graphical aberrationa or overheating though after 4 hours or so the problem began to appear.