It can be a challenging game, but that challenge mostly comes from having to slug it out through many battles against increasingly strong foes, rather than from having to make complex tactical decisions during those battles.
With the lack of any counterattacks (excluding the Issin command), the game plays something like an RPG set on a SRPG map. There is little strategy involved in clearing a stage, as you can attack with abandon and the areas themselves are far from interesting.
A soulless cash-in. Every aspect of the game seems hostile to anyone intending to actually play the game. The story is mediocre, the interface is obtuse, the combat is oversimplified and there's little to do or find.