More experienced users want to take advantage of all their Sony mobile device features. Sony Mobile Flasher has been made especially for flashing Sony devices such as X10 or Xperia Z Ultra.
It also has a lot of other different functions which an advanced user may find useful.
If you have issues in opening the bootloader, then Sony Mobile Flasher can be helpful because it can quickly open it. These features can come in handy especially because the official Sony tools aren`t working anymore and if you want to do these advanced tasks, then you need a tool which does the job right.
It is also a good choice because you can choose what and what not to flash.