This product continues 4e's trend of presenting playable character races that are fantastic yet different from the Tolkien-esque staples. The Linotaur is cool, and that alone is a draw. The mechanical design is on-par with the core races, giving you something that will stand out but should not unbalance things. I like the fact that the Linotaur occupies non-standard space on the grid; along with its high mobility it opens up a lot of interesting tactical options. The racial abilities presented are expected for this type of creature, enhancing the race's natural abilities and weapons. It also includes information on Linotaurs as monsters, making this product twice as useful.
The only thing I would have liked to see included is a bit more information on the ancestral spirit cult of the Linotaurs. We get a glimpse of it via a sample adventurer's description and a Heroic feat, but that's it. Which is a shame because it provides a very interesting story hook, alongside the Linotaurs' tradition of gathering tales of life experiences to recount at pride meetings. Perhaps that can be included in a future expanded version, one that also includes one or two paragon paths and an epic destiny.
This is a solid product, at a good price, presenting an interesting new race for 4e gameplay. I'm very pleased with it.