It's Westwood Studios, that's reason enough right there!

But I guess it's just one of those games I remember seeming pretty interesting at the time and never got around to, but can't place why anymore, possibly I only had the demo from a PC magazine or something, searching says you had some LAN and one of the campaigns in the demo. So, maybe less get back and more play through for the first time. From the description it's a more linear Diablo (no backtracking) with fog-of-war, and three separate campaigns. That and it's just one of those games you see people write somewhat frequently when talking about what game's you'd like to see on GOG. I do like the look of it from the screenshots as well.