Lionheart is one of the better RPG's out there. Its system is superb, it's one of the best games you could play. However, it's not as simple as that. Despite having a good system, the idea of magic was very limited, with something around twenty spells that didn't really do much anything special (thank goodness they didn't, though, because specializing those few would be awful). It made mages incredibly boring. Sure you could kill people, but in no fun manner. Just a shallow one-click manner.
Fortunately, it's redeemed by its melee and ranged combat systems. Arrows/Bolts of Infinity allow for you to shoot on and on, while special arrows do more damage. You can set attack speed and target area. It's a great game, but it'll turn your hair grey.
My final gripe with it would be its repetition. The environments feel nice, but the amount of walking is insane, and once you go through a place once, you're really unlikely to experience any new things. All in all, it's worth the $6, but probably not $20 if you aren't a really hardcore RPG player.