Huge LOTR fan, but hear the game is a rather generic MMO.
i can't in good conscience, recommend this to you.
i currently own pretty much the entire game (unlocked via purchases) & i am not even going to pick up Helms Deep.
given that you don't know me from any other random stranger... if you still are curious, try what you can for free. & if you do decide to spend, make sure you know what that purchase will give you.
currently HD is coming with massive changes to class skill trees. that looks to be an exact copy of WoWs old 3 tier system. but missing some key elements that games with tiered skill trees have.
Big Battles haven't been seen publicly, & i'd strongly recommend waiting to see those in action, if that is what is drawing your eye.
the smidgen of what has been shown just looks awful.
does this look like HD to you?
if you still are interested, try it for free.
& wait until more of actual gameplay of Helms Deep big battle system is shown in action.
if you spend money blind... you have my deepest condolences.