..... I never want to live in another panel building again!
Yup, that's about the size of it. There are lots and lots of these panel buildings in Budapest but they are on the periphery of the city - usually 5-10 of these kinds of buildings clustered together with the basics like a supermarket and a few shops underneath and garages plus (as I said) a shopping mall close by (walking distance), some open space with a car park and children's playground. I've been to Moscow and all the East European capitals (except Poland) and it's all the same model everywhere I've been in the former communist countries.
It's not to say the buildings in the centre of Budapest are better in quality but they do have character in the centre and the room sizes can be enormous. Usually you see rough external appearances of classic buildings, poor stairwells but inside the apartments can be very interesting and if well restored, very attractive living spaces (not sure of practicalities). Wood floors, high ceilings, wood windows etc. Depends on what people want!