Hey there!
If you like Combat Mission series and/or Close Combat series, then I highly recommend to check out Achtung Panzer: Operation Star. It really is a good tactical wargame and it's different from other similiar games.
Fore more information and help, check out this fan-site:
http://graviteam-games.goodluckwith.us/There you can find information about the newest Graviteam games, news, patches and MANUALS.
If you get the game, I really recommend you to always install newest patches! The patches are not just fixes, but also increase unit density, add new features and even some content! Also carefully read the manual, even if it doesn't tell you everything and might be slightly outdated. The user interface and controls might look difficult at first, but in the end it's much better (in my opinion) than Combat Mission has. Remember that the game is not like other games and commands work in somewhat different way. And have some patience.
You may also download the demo, but it's outdated at the moment. Maybe it gets updated in the near future. Hopefully this answers to some of your questions.