I used to play it about 10 years ago. But I stopped after a bad experience with it.
I mentioned it to a "friend" who was also playing it and he wanted to play against me, mostly to show of his huge deck of cards that he had spent hundreds of dollars to make "perfect". Me on the other hand only bought two decks and played a little with one of my friends cause it was fun.
Anyway, I didn't make much fuzz about it and thought it would be nice to play and I won three time in a row. He (a "grown up" in his twenties) almost started to cry. I felt really uncomfortable since I didn't want to make him upset but I just could not loose, I even tried to cheat a little in his favor the last game.
After that it wasn't fun any more. If games can't be fun for everyone I can't see no use in playing at all. So I gave all my cards to my kid brother (including some card that was supposed the be super-rare.).
Was that off-topic or was it?
Anyway, I used to play and really liked it. But nowadays I don't have anyone to play with (or any cards left for that matter) so, not any more.
My brother used to play, and he'd get mad sometimes if I beat him, which I usually would. My friends played it pretty casually, but I got really into the tournament scene and actually got to go to a few professional tournaments. Even won some money a couple of times.