So, I finally got around to finishing Rokka no Yuusha.
Up to about the last 10 or so minutes, I thought my first response was gonna be "Season 2 when?"... but then that, umm, other girl showed up. And now all I have to say is thats one of the ugliest character designs Ive ever seen.
That said, I really enjoyed the series up to that those last 5-10 minutes. It definitely wasnt what I was expecting, and it was pretty boring for the first couple of episodes after Ep1, but I think they did the locked room mystery pretty well.
I think I would recommend it, but only if youre OK with endings that leave more open than they closed up. Classic light novel adaptation. Im sure there are plenty of people who would find it completely boring tho, so its definitely not one that I would say push yourself to watch if you dont like.