I find this movie funny with respect to its plot and characters. If you have somehow been involved in/exposed to some sort of old-fashioned aggressive marketing (especially in Turkey), you might find it a good laugh.
I am one of those who find Sahan funny and I think the Osman character was a well fit. The other characters were also funny, although the artistry is questionable from time to time. Sometimes the transition between events was too quick. For example, the transition to the final stage could have been somewhat smoother.
If you enjoy the movie trailer, go for it ...