I say go for it, play until your heart stops!! (only joking lol) I've started playing a week ago and i'm addicted i don't know how some people can stop except they might get bored. The trial might be bugged but the real thing is better than ever (my cousin told me). After all if don't want to play it you can always stop the subscription.
"This is my story. It'll go the way I want, or I'll end it here." -Tidus, Final Fantasy X