While a good concept I personally didn't really like it. The start is a pretty big bummer handing you a crummy set of allies most likely and putting you up against quite a bit tougher monsters. This is quite minimal though due to the fact that you can usually outsmart them and get some better creatures soon. Something that troubles me is the lack of any real strategy once you have a real winning team going. Like boffo's which is a godly team of 3 Trike's and 3 G. Dragons... I'm not sure but I think trike's and Gd's even outclasses any of the shadows at max level. The only real satisfaction I got after my army had reached MAX Lv. is fighting the bosses at the top. Overall a good game if you know what you're doing which unfortunately depends on how much information you have at you're disposal... which is probably none until you get at least half way...
On a side note here is a rantish thing I have about the ending. Not that you care
FennOfTheFlames' comments