You shouldn't ask about it here. Haruhi is the FF7 of /a/; It's alright, but it's fun to hate it because it was popular. Cruise control for cool and all that.
It's enjoyable, but the episode order is a bit strange. I don't care for it and prefer chronological order myself, but you probably should watch it in broadcast order your first run through. It's worth watching for a few laughs even if for nothing else. It's basically a school comedy with some paranormal/sci-fi and other stuff thrown in. I personally thought it was good. Not exceptional, but good.