This product is everything it says it is. It presents us with a dozen armor and shield properties, oh, and a spell; a spell that is used for one of the properties.
I really liked most of these special abilities (especially deeds and energy backlash) and found them quite useful. There were a couple with some flaws (the helpful ability is way too cheap, a +1 bonus would be fair for this, and the athletic ability should list what type of bonus it gives to speed, probably an enhancement bonus). There were a couple that were poorly written and confused me, like the runic and anathema ability (I know the gist of what they do, but I am still unsure of a couple of things). However, the rest were really cool and I am absolutely going to use some of these in my own games.
The layout is a simple two column layout with a few illustrations (that I could easily have done without). As I read the pdf, I found myself noticing a couple of minor mistakes (sometimes the author writes CL and at other times he writes caster level, also, minor is not used about aura, it is called faint), but really, these were just minor mistakes and nothing that disturbed my understanding of the material.
For the low price, this is a nice product that I would recommend to players. I am going to settle with a 3.5 verdict, rounded up for the purpose of this format.
[4 of 5 Stars!]