I did my FI course at Cavok last summer. They are quite a big flight school in the area, operating from Gödöllő Airport, which is 20 km away from Hungary. However if you don't have a car, it is troublesome to get to the airport if you live in Gödöllő or Budapest. But I think they offer airport accommodation as well. The instructors are really friendly, I know some of them personally for years. I keep my aircraft in the same airport, so I see Cavok operation almost every day. They fly a lot if the weather is good, so you can finish the course pretty fast. They have AT3, Tecnam P2002, Viper aircraft. I don't have experience with those as I did the training in my own plane, a Pipistrel Virus SW 121. To sum up, instructors are nice, airport has its retro-style charm, with 1 km long grass rwy, and close enough to Budapest. I liked the FI course itself as it deepened my knowledge in many ways. I developed skills I use very often when I instruct my students nowadays.