While not the strongest university, ELTE provides its students with a uniquely systematic and mathematical approach to computer science. This means that you will have a lot less actual high-level programming (f.e. you only learn about sorting algorithms in 3rd semester) but you will have a stronger intuition and understanding about simple programs, and slowly build up from there. You will be taught how to prove that a program is correct mathematically.
Having said that, other universities are far better at teaching you how to program in an actual programming language like C# or Java, and you won’t be taught any physics or hardware-related subjects here. ELTE focuses on the theory behind software, but not on applications.
One of the major upsides to ELTE is that it is very fair. Its grading systems are understandable and reliable, the exams cover only what has been taught, which doesn’t apply to every hungarian university. Here, you don’t feel like the teachers and the students are ‘against each other’.