I know many prefer the Szecheyi and Gellert spas, but I would prefer to go to one that's not so expensive. Also, since I don't have a swimsuit, I'd prefer to go to one where you bath nude - it's quite normal if you're used to Japanese onsens.
Which one out of Dandar, Kiraly, Lukacs or Rudas be the "best" choice?
Also, the websites mention a "morning ticket" that's cheaper. Does it mean that you have to enter and leave between 9 and 12? Or just enter before 12? Or there's a certain time limit that you need to keep to?