Overall, the strategy side of this game is good. You spend time planning and timing attacks. There is some diversity of strategy, and you get to pick cool units from basic fighters to elves to orcs. However, the interface is clunky, and the controls are not intuitive at all. Worth it if it's on sale and you enjoy retro games.
This is an extremely addictive, fun old game. It is loosely based on the Basic/Expert family of D&D rules. The main issue is that, even back in the day, it would crash occasionally. Running this version inside of DOSbox seems to be, if anything, a more unstable environment. Save frequently, but beware that some game conditions can make repeated crashes all but inevitible. Large strongholds, many enemies on the map, many sprites in battle, certain events (like destroying a stronghold), and just leaving the game open for too long all seem to increase the chance of the infamous Error 27 crash, but there really isn't a clear pattern to what causes it.