I like the fact of being able to use it in multiple locations without having to worry about viruses, malware etc.
The interface could be more intuitive for new users (it's not easy). Also with this version there are some bugs which make me think they should add another option where we can choose between using tails as an OS to simply boot up and have access to all our data files through ssh. It works perfect! It has been very useful when traveling because if my laptop got stolen then i'd still be connected to the internet even though the thieves would've had full control over everything.