Played the XBLA trial and bought it immediately.
It's solid, well designed, and special note goes to the Ash-like hero's attitude, VA, and the soundtrack. Gothic cheese-rock with just the right satirical schwing to it. Hero makes constant snarky comments, plus actually says things that are useful to gameplay such as "they're under the bridge" and "they've made it around the corner". This stuff matters.
FYI, deeper in the game than the trial goes, you actually get skill trees to level up during a map and make decisions on what elements of your hero abilities, and trap mechanics, you'd like to buff. These are not permanent upgrades - the skill tree resets every time you play a map. You can also replay earlier maps in the campaign with all of your new traps, upgraded traps, and expanded skill bar in order to get superior scores and times on the leaderboards, so this is not one of those games were the early maps are basically wasted on tutorials and never seen again.
I actually am looking forward to trying Nightmare Mode with an upgraded hero and such, because you get f**king deadly as the game progresses, and can set up serious meat grinder trap combinations. Total slaughter.
Folks should really not sleep on this game. Nicest little package I've seen on XBLA in some time.