I had a terrible experience in this restaurant. I went to have dinner on 29/01/206. At the end of the dinner, after paying the bill, the waiter came to our table and tried to forced to pay him a tip of 10% of the bill. He insited angrily several times untill I told him that I wanted to talk with responsable of the restaurant.
In my opinion I am not forced to any tip. If I consider that the service I received was good, I can leave a tip that not necessarily represets 10% of the bill (could be less or more).