Wasting one's life never felt so right...
It is worth hunting down and playing if you haven't. It's likely bargin bin currently, but don't let that fool you, this game is top notch. Great characters, great story, great gameplay, great sound, great use of the Star Wars licence. Frankly, outside of the KOTORs, no other Star Wars game comes close to touching JKII.
Reviewing the Multiplayer is a different subject. Trying to be objective is tough. It was great if you had the patience to learn. Like all online gaming, you're experience differs depending upon the company. Some people, self included, were a tad on the ruthless side. There are patches out there, but I must say that the right out of the box retail version had more strategy in online fights. The patched versions leave little strategy other than swinging your lightsaber like a sparkler.
Think Outcast was also better than Jedi Academy that followed it. For whatever reason, Outcast seemed more realistic. Academy seemed more aimed at a younger audience. JKII is definitely in my top three games of all time.
Only downside is you don't get a freaking compass. Getting lost is way too easy. Some of the puzzles are a bit confusing, tedious, and difficult... but taking down stormtroopers with a lightsaber is all worth it.
If you end up on Nar Shadda, I'd recommend the Ruby Bliels.