Its a competitive version of LoL. It has kind of a darker theme to it, and better graphics. Community is pretty rough though (stay away from the forums if you don't want to deal with it), and there is a lot of sh*t talking and whining/crying in games. I prefer it over LoL, but I've had so much of it from playing DotA for years and another year or so in HoN, I don't play much anymore. $10 is a really good deal though for anyone who has been thinking about getting it.
Yep. People who played DOTA and actually enjoyed it will end up enjoying HoN.
I wish they would make heroes a lot faster though. They should just port all the heroes over. They're missing like 20 heroes that really were awesome. They still don't have a drow, huskar, phantom assassin, lancer, tauren chieftain, phoenix, twin head dragon, obsidian destroyer, oblivion, dark seer, invoker, goblin techies, shadow priest(dazzle), tormented soul, windrunner, panda, keeper of the light, enchantress, furion, etc.
So many heroes they need to add...