Disclaimer: I received a free copy of this product for the purpose of this review.

This is a 16-page, full-color (if mostly rather gray) PDF, with ten pages of rules material.

The Time Assassin is a mid-BAB class with good Reflex saves, and 6+ skill points for level across a decent spread of class skills. The class itself is among the most straightforward you'll find, as there are few choices outside of picking weapon groups for proficiency at various levels. The class is also almost entirely Intelligence-based, eventually gaining the ability to apply their Int modifier to their attack rolls, damage rolls, AC, and even skill choices not normally triggering off of that stat.

The main resource for the class is their Paradox Pool, which determines capacity by their class level plus their intelligence modifier (so, likely to be 5-6 points at the start of the game, depending on how high they were able to pump their Int score). The Paradox Pool can be used to apply a variety of small, non-scaling buffs, or to fuel things like their Time Split ability (which allows them to be in more than one place and take additional actions, albeit with limits on what can be done).

Starting at fourth level, they also get access to Temporal Rifts, which are quite expensive for class abilities (especially when they trigger off the same resource pool as everything else). The ability to move objects in an area backwards in time (to open doors, clear collapsed hallways, et cetera) is free to use, but the other options cost 3-6 points per-use, rather sharply curbing what they can do for the day.

This product also has Favored Class Bonuses for the core races, and two archetypes that provide the only real customization the class gets. (Seriously, everything else is pretty locked into place.) The Time Madness archetype is basically more for fun than anything else since the duplicates take on a random alignment (and may thus be quite unpredictable - or able to get through alignment-based things!), while the Focuser emphasizes watching opponents for awhile and then striking for all the damage at once. This is probably a good choice for people who don't want to do too much in combat, and notably, it also distinctly shrinks their Paradox Pool and makes it harder to use other abilities.

As you've probably picked up by now, the Time Assassin is geared towards a fairly specific style of play - more so than most classes, because the only real decisions you're making are "which weapon should I use?" and "do I play normal or Focuser?". This isn't inherently a bad thing, though most classes in the game try to be more flexible - in fact, this might be a pretty good option if you have a player who wants to fight but suffers from a bit of choice paralysis when they look at all the options in the game. It is, however, something you should know going into this product - there are basically just two ways of playing this class, and everything else is fiddly bits.

Overall, I feel this class is about a 4/5. It's relatively good at what it does - making up for its reduced accuracy by creating clones that can simply make more attacks instead - and it has a little bit of out-of-combat utility if a player is sufficiently creative with their first Temporal Rift and their time clones. That said, it's definitely a combat-focused class, and players shouldn't expect to do much else with it.