I liked it a lot, however to me after the earliest scenarios it becomes really hard even at lowest difficulty levels, so I pretty much gave up on it until the low difficulty lower levels become playable by non gamers like me.

A very different, way simpler, but easier and still enjoyable game is Megaglest. https://en.wikipedia.org/wiki/MegaGlest

The homepage seems dead these days though. I hope they didn't abandon the project.