The Good: chromoly, thin, strong, loads of room inside, what else do you need?
The Bad: covers a bit too much area, may get in the way of your chain depending on dropout angles.
Love this hubguard, BUT i would not purchase unless you are prepared to do a little editing. depending on what size chain, tension, and frame you run, the guard may obstruct or rub your chain. this can be easily fixed by taking a grinder to it and grinding it as you see fit.
personally, i prefer that, because then i can make it exactly the angle and shape i desire, just like most bars come in large sizes with the intention of you cutting them down. may take a bit of work, but it's good for ya (: