You know the drill - 3 pages, 1 page front cover, 1 page SRD, 1 content for 12 new substitutes for trapfinding, so let's check them out!
-Black Marketeer: +1/2 level to appraise, + level to percentile of price you get when selling.
-Chink in the Armor: !7day, when sneak damage is negated (by e.g. fortification), as a swift action deal half damage anyways. Usable additional times at higher levels.
-Climb Walls: +1/3 level to climb checks, need only one hand to climb and not lose dex when climbing.
-Harass: For each sneak attack dice you choose not to deal, impose a -1 penalty to atk, CMB, ability, concentration or skill-checks for one round.
-Hoodwink: +1/2 level to bluff-checks, option to fool magic effects that determine truthful answers.
-Ki Pool: Gain a ki-pool like a ninja and as long as you have at least 1, treat all acrobatics-checks like a running start.
-Pick your Way: +1/2 level to acrobatics, don't treat crowds as difficult terrain.
-Poison Use: Self-explanatory.
-Trapmaker: +1/2 level to craft (trapmaking) and make traps that are harder to spot. Option to learn ranger traps at higher levels and gain more via talents.
-Turn the Knife: Deal +1 damage per sneak attack die versus foes denied their dex-bonus.
-Street Tough: Gain proficiency with all martial weapons.
-Sacrificial Blow: 1/day add sneak attack to an attack that wouldn't count as sneak attack at the cost of provoking AoOs from all threatening creatures. Can be used more often at higher levels.
Editing and formatting is top-notch, I didn't notice any glitches. Layout adheres to SGG's 3-column landscape standard and the pdf has no bookmarks, but needs none at this length. 12 options to replace the vital trapfinding make for difficult choices and indeed, they feel balanced, though some are obviously suited better for certain play-styles (Black Marketeer making e.g. only sense when the PCs don't swim in money...), while certain ones at least imho might be especially useful for NPCs or mostly useful in urban settings, I can't fault the pdf for that. All in all, these are well-crafted, interesting options and thus, my final verdict will clock in at 5 stars.
[5 of 5 Stars!]