Summary of the NP review/mini-guide with my take thrown in (from reading it, not from playing it):
The graphics aren't great, but they certainly aren't awful. If you've played a GBA RPG, these will look similar. No animation, but the general graphical quality reminds me of a primitive SoM look. Not quite as detailed with characters and whatnot, but distinguishable. I'd say it's disappointing from the standpoint that the DS can do better, but I don't think they'd detract from the game.
Pretty standard story, but it looks like there's a twist later on that will determine the type of character you are from that point on, so there's at least one story branch.
The battle is more like an RTS... you use the stylus to point and click your units around, fighting is in real-time, and you use the stylus to draw runes for spells (which seems difficult, but ingeniously so; very similar to how it would be in reality if you were a spellcaster I would assume - the more powerful the spell, the more difficult to memorize and execute). Some runes you learn as you progress through the game by meeting people, others you have to figure out yourself (combinations of basic runes, etc).
The multiplayer seems interesting. Battling against other players with the character and monsters you have gathered through the course of the game.
It seems the one overwhelming negative is a time-limit that is placed on each map. I'm really unsure how that comes into play (whether you have to complete a task or something in that time or the level simply ends after x time and you encounter a boss). Either way it limits the fun that could have been had. Another negative mentioned by the second reviewer is substandard AI, but no further details or examples (maybe the "I told my creatures to go that way but they couldn't walk around the rock"?)
So, my opinion after this review boils down to the usual "Well, I'd buy it for $20 or less... but with GR credit this is $20 or less - and finding DS games under $20 is a crapshoot"

So if they ever get it in, I will be jumping into it.