I'm a good 10-15 hrs in so far, playing on the PS3. This game is very well made imo. It shares some modern trappings with games like Uncharted, but pays homage to the Tomb Raider games of yore.
It's got a nice mix of linear and non-linear gameplay as well - areas that you've been to previously can be quick traveled to, and you can access areas of them that were inaccessible before by using equipment you pick up on your travels (similar to metroidvania type games).
All in all, I would highly recommend this game!
up. ^_^