Back when TSF first emerged, import was the only way for us lowly Americans to get the thing. Now it's nigh well improbable through legal channels.

Of course, it's all a matter of whether it's worth it or not... it breaks map compatibility with previous Jazz versions (Even if you use normal-size tilesets and none of the three or four extra TSF events), it has a few nasty bugs (I think there's one involving Lori and vines or helecopters), etc... If you want it for nostalgia or curiosity, I say go for it, but besides that...

Then again, if you're from Europe, you can find it fairly easily, so nevermind. :-)