The mod introduces many mechanics from Diablo 2 into the original game. Makes the game more dynamic and more fun to play. More monsters/items/quests introduce more variety into the original experience, while several quality of life improvements make the game less tedious. The game might be difficult or straight up unfair at times (when the monsters are just the type that counter everything you can do), but I guess that's the charm of old-school Action-RPGs. For the price of "free" I can heartily recommend giving this mod a try.