Summary: Front Mission is a pretty fun game, from what I can see so far. Unlike many tactics games, which seem to be packed full of meaningless, easy fights whose sole purpose is to pad out the length of the game, Front Mission has challenging fights that not only require the player to maneuver his mechs with care and foresight, they also require him to design his mechs properly. A mech with a bad loadout will stand no chance on the battlefield no matter how crafty the player is.
Summary: I would definitely recommend Front Mission DS to anyone looking for a worthwhile SRPG on the DS. If you love mechs, like I do, you will enjoy this game immensely. Front Mission DS features an extensive array of customization options for your Wanzers. In fact, customizing your Wanzers and experimenting with different combinations of units is one of the most intriguing portions of gameplay. As for the battles: they can be quite challenging!
Summary: This is a turn-based mech combat game. It has role-playing aspects in that your characters gain skills equipment as the game progresses. The gameplay is fun. The missions are moderately challenging. The graphics are acceptable. The game's biggest downside is the interface. It's obvious that they didn't write this with the DS in mind originally. The click-regions are small. Many actions require a double-click: one to select and another to accept.
Summary: Square's Front Mission series actually goes back quite a bit to the days of the Super NES, of which this DS title is pretty much derived from. Front Mission is a strategy/RPG featuring battling mech suits; a description which should give you an idea of whether you want to give this game a look or not.
Summary: Try going to IGN or 1up if you want a thorough review. As for me, I really enjoy this game. I don't recommend it for younger DS owners, as the learning curve is pretty steep [you really do have to read the manual if you're new to the series], and it has quite a bit of complexity. There actually is a tutorial mode, but it only shows you how to do the very VERY basics.
Summary: This is probably the best tactical game on the DS. There is lots of value in the title, well over 30 hours of game play. I don't recommend this game unless you are a fan of the Anime or Mecha genre as it is a niche title.