So, I actually live near Margitsziget and decided to check it out when I had a free Saturday with pleasant weather. It wasn't a very pleasant experience. One, there is not a lot to do there and a lot of the buildings are run-down looking or closed. There are literal historical ruins on the island, which is fine, but there are also "modern ruins" that are just eyesores--buildings that have been abandoned and covered in graffiti. But the worst problem was how crowded it was. Maybe the day I went there was an anomaly, but the crowd seemed incredible to me. I felt like I was back in the States at Six Flags or something like that, with young couples and families running every which way. It was the very opposite of relaxing. And forget coming here to do something you normally do in parks, like play frisbee or something. You'd never find that much unoccupied green space. You'll be lucky if you find a place for your picnic blanket.