This show is not for everyone but even so it was the funniest one from the last season (the only competition being Space Dandy).
The whole thing is really well made, starring a strong cast, having consistently good art and featuring fitting music and even having themed songs (not to mention the mini-story in the ED).
One would think that being the second work of Production I.G.'s offshoot Studio WIT, who had a bit more than just a hit with Attack on Titan, it would garner a bigger following even outside of Japan... apparently not. I can only imagine that it's because it appears to be dry to some folks. The humor is often very random and requires a certain knowledge of Japan (I cannot phantom how many jokes I possibly missed) but even then there is still slapstick and plenty of fun animal characters to enjoy.
If you end up in hell you better see to that it's the Japanese one (and not the European).