With Platinum being an all advanced game from Diamond and Pearl, it's obviously better out of the two and thus, worth it - at least for the fourth generation. It definitely isn't one of the best Pokémon games out there, but it did have a couple of features brought in that DP did not include, like the Distortion World and being capable of obtaining all three legendary dragons, etc. It did also, bring back some spark to the Battle Frontier for me, so that's also a plus. Overall though Platinum was worth it, at least more than DP was itself.