After 14+ hours with this game's campaign (and still more to go), and a few more hours with it's Skirmish mode vs AI, I can say that this game truly is a hidden gem of the RTS genre. Though the campaign story writing is cheesy and corny to an extreme, it is at least voiced by somewhat professional English-speaking actors. And though the writing is silly, the actual mechanics of the campaign were designed by an obviously smart and thoughtful team of people (even if English wasn't their first language...).
I've honestly never had as much drive in an RTS campaign to finish each mission as I've had in this game. The scenarios are very challenging and may require some reloads, but none of them (so far) are broken or impossible. The game rewards micromanaging but also overall strategy, and the units, damage types, spells, and technologies are very well thought out and designed. The game had bad PR, a questionable name, a foreign developer, and some strange design choices, but it was clearly made by hardcore gamers with a deep understanding of RTS mechanics and an exceedingly creative spirit. This is the last (and probably the best) game in the strange and exotic Cossacks series from long ago.
Add to this the fact that this game's graphics are easily some of the best ever from the mid 2000's era, and I was very impressed with the look and feel and how well it aged, even though I tend to be a graphics snob. The sheer wealth of fantasy creatures, all of which look pretty awesome even by Windows 7, 2015 standards, is amazing for a game this old.
The game has flaws for sure and a few bugs occured during the campaign, but basically, it's a ridiculously good buy for the content you get (expect about 20 h for the solo campaign), and is a great blast from the past if you're in a nostalgic mood. It is a tragedy the game's developers are now mostly defunct, though I do believe there is a community out there who still appreciates this game.
Please message or friend me if you are interested in doing some multiplayer skirmish games. I'm trying to put together a group that is willing to play on the occasional evening, because, even though the AI seems somewhat competent even on Normal, the sheer wealth of this game's units and spell strategies are best suited for the discerning mind of a human player.
Cheers, and I hope this helped!