[quote name='G33']Looking at some descriptions and gameplay videos, the mechanics look similar to Dungeon Siege. Is that right?[/quote]
It's like a blend of an RTS with Neverwinter Nights--60% of the time is spent playing as main group of heroes that gain levels, have skill trees, and can use gear; and the other 40% is spent playing the game as an RTS in which you still manage your party of heroes, but they're aided by a Warcraft-style RTS army.
The game is incredibly unique and a ton of fun, but don't come looking for much of a story: the writing is terrible, the dialog is lame, and the voice acting is quite awful.
The collection is EASILY worth $15 for the unique gameplay, but the generic story make it fall short of a full price purchase.
Trust me RTS / RPG fans: for $15, you're getting an absolute TON of gameplay.