5/5
Aside from the occasional bugs, I had no problems with this Definitive Edition. The new classic lighting update is great (and looks great). A good thing about this edition is that the shooting mechanics are better than in the original, and you can change the controls, though I played with the classic control scheme.
Some bugs that were annoying: 1) sometimes the military chopper is unable to shoot missiles. You have to exit the game and restart it to fix this; 2) sometimes during the rampages no civilians or gang members appear on the streets. Again, you must exit the game and restart it to fix it.
Other than that, this is a great game, a must play for every GTA3 fan. I completed it 100% because I was so fond of its atmosphere and wanted to keep immersing myself in it. I still prefer GTA3 (I think the story is better and, believe it or not, the atmosphere, too), but Vice City is without a doubt a great game.