Short recap:
SP consists of 8 semi random 4v4 skirmishes chained together followed by a generic "you win" speech from the narrator who tries to immitate the UT guy.
MP consists of people yelling at you for not having played the beta and kicking you out of every game or leaving the ones you host because of that.
There's 8 maps and only one of them is played online at all, which is the tiny square one with no feaures other then the bases. Incidentaly, it's the only one playable in SP because the rest is full of pathing glitches.
All of the heroes are standard archetypes being, in order, ranged AOE, single target melee, single target ranged, cool looking but useless guy, support, sieger/micro bikini elf, healer, single target ranged.
The back story consists of about 4-5 paragraphs for everybody, icluding a rather detailed report of a siege, with ends with a king dieing and his house deciding to kick ass for no reason whatever(and thus we end up with the Rook, which does a better job at standing still and let all his mounted guns fight then doing anything himself, making for an extremely boring hero).
Maps themselves are bland, being completely flat with no features other then towers by either faction(light, in orange and dark, in pink) and have rather nonsensical(although generaly cool looking)backround designs.
Mandala is a disk suspended in a frozen cave
Cataract is the top of a fountain
Crucible is a odd shaped platform next to a lava river
Prison in a vertical pillar with the battlefield on the top
Zikurat is cataract with more color
Leviathan is an oval withno features whatsoever.
Exile is a statue of a man being assaulted by a snake in outer space with the(still featureless) map taking place on the back of the snake
The Brothers has four skeletons which stabbed eachother in the face with swords at the same time while and somebdy decided to build an 0 shaped platform on their swords.
It also enforces atleast 3 players on each side in skirmish, even on the map that is considered 2v2 ad it crashes when alt tabbing.
It's a lazy and rushed game, all in all, you are better off downloading the newest version of dota or get eve of the apocalypse: twilight if you want a change from always the same 3 lane map. Both are free because if you played dota, you already had warcraft III.