I have only watched the first two episodes but I am already captivated by its charm.
First thing first. Ertan Saban is displaying an exceptional performance as the lead character. He is funny, charming, and most importantly, believable. I've never heard of him before, but I'll be sure to keep an eye on him from now on.
The rest of the cast, which is enormous, is also doing a great job.
The story can be explained as, "easy to learn, hard to master". A gangster named Yedi Emin (Ertan Saban) suddenly decides to turn his life around, in this case literally, and turns himself into the police, offering them key information about the gangs in exchange of witness protection. His name is changed to Sadi Payasli and starts working in a high school, as a geography teacher. What can go wrong? We'll see :)
But while doing that, it dives into the lives of several students of that school. We, as the audience, see the world from their eyes and experience their problems. Which was very well portrayed so far.
Overall, I enjoyed watching these 2 episodes. It maintained a nice balance between comedy, action and drama. I can only hope they can keep this up. We'll see.