Tried it, hate it. Closest thing I really like was footmen frenzy in WC3 but the balance is broken and all the games there are DOTA, DOTA, DOTA.
Aside from my dislike of the gameplay, HoN really needs to refine its interface and tooltips. When a tooltip covers a gigantic chunk of the screen with text something is wrong. The menu and interface come off as convoluted and non-intuitive. There is nothing wrong with a game having a lot of information and depth (though I really wouldn't call what HoN has depth), but it needs to be presented in a better way. The game also looks too much like WC3. I know its based of DOTA, but adding some originality and character to the game would be nice.