Stay away from CAVOK!
They are by far the most ridiculous ATO in Hungary.
Just google their accidents and find out how many people lost their lives. I was about to enroll as a PPL student but one of their current student advised me not to come here because they are lack of maintenance staff and nobody cares about the aircraft they have. Later, the aircraft crashed into the forest and both (other) student and instructor died.
My advice is to pay a visit to Hungary and see Multifly or any other ATOs has been discussed in this forum with your eyes, ask for a demo flight with an instructor and feel satisfied before you sign any contract. During your training, ask what is the reason every time when they deviate from the training plan of yours. Never hold back and insist on what you expect and what they promised at first place.
Poland is also providing good training but I’ve heard about only one ATO named Adriana Aviation.
Also good to mention that I am not representative of any above mentioned ATOs.