I quite enjoy it, stock game is quite nice, particularly on the infantry site. The game is defiantly not a fixed wing flight sim, helos are pretty decent and a lot of fun.
Add in the ACE mods and you suddently have a very realistic infantry and to some extent armour sim. RPGs and launchers create deadly backblasts, rifles can be stablized against objects, people can be wounded and dragged being cover for treatment. I very much enjoy it. It defiantly does combined arms very well, one of the few games you can guide in artillery. Very fun in multi.