I gave it a 4. Many of the cars are shaped kinda funny because they ran out of available pixels it seems. Everything seems half-baked, but at least they tried. Also, some tracks like Tahiti Road look like somebody drew it with a crayon! There's so much pop-up it gets to be silly. Entire hills or buildings disappear when you look back on them. I was disappointed with the graphix. I figured: hey...GT2 is split into 2 discs..the graphix are gonna be so *****in'. GT1 is better than GT2 for realism's sake, but GT2 is still my favorite.
Also, GT2 can't compare to some games like some of the later Final Fantasies or Tomb Raider, but on the other hand, GT2 isn't horrible. Some tracks like Grindelwäld look pretty good. So yeah, a 4.