its worth it. usually you see some cars that you would not see at other shows (skylines, RHD hondas, evos). its the best of the best at HIN. last one i went to, there were about 7 skylines, an evo, both spoon ITRs were there, stephen papadakis' AEM honda civic (8 sec. drag car), the FnF2 cars. plus ALL the hottest import models are there (flo jalin, tila ngyuen, sharon soto, courtney day, etc. ). its the one show i always try to get to.
you'll find nice big galleries from recent HIN shows here:
http://www.carandmodel.com