Rokka no Yuusha in a Nutshell:
This show is basically one big game of Guess Who. The characters all have the same goals, but doubt each other and sometimes even you as the viewer doubt who is trustworthy. It is a nice mind-bending anime, with some interesting characters, and decent enough story but can possibly get kind of stagnant to some as it doesn't really progress. Also cliffhanger.
Should you Watch?
Try it. It might surprise you.