I personally think this is one of the best, if not the best overall game that has come to America from Japan this generation (and definitely the best, if not one of the best games that Sega has their name attached to).
As a fan of SRPGs, this game does an excellent job of masking the traditional approach to turn-based strategy games with the "illusion" of real-time, so it doesn't feel as slow (although the time investment per battle is roughly on par). The way they approached unit movement and battle also feels a lot more engaging and immersive than what most people are used to (i.e. Final Fantasy Tactics, Tactics Ogre, etc.). They do a lot of smart tweaks to the system that streamline the experience and highly reduce the grinding aspect of turn-based SRPGs that I hate so much.
For those of you worried that you'll have to use your brain (yes, there are people out there who don't like thinking when playing video games), nothing in this game really makes you think and you can kind of abuse certain (very obvious) units/strategies the entire game (you may have to think if you're trying to get S rank on every mission without reading up on how to do it though). To be fair though, outside of puzzle games, video games are not a good source of intellectual stimulation.
I normally don't post my thoughts in these forums on things like this, because I realize that in the end, this is entirely subjective, but at that price point, you'll be hard pressed to find a better value per dollar anywhere else on any system. Unless you're living in poverty or have gaming as a very low priority in your hierarchy of hobbies, you really can't go wrong with this purchase. For those of you who are just not a fan of these types of games, well, it wouldn't have mattered how low this game got in price, so just move along.