I can recommend this game mostly for the plot and characters. THe writing is excelent, but everything else goes from anywhere between decent and weak. The graphics are sub-par, the music is forgettable and the voice acting goes from excelent (a couple of the actors in the series worked on this and deliver good performances) to mostly plain and laughable... Shame, since excelent acting would have helped the already excelent plot.
Now the combat... the combat is like most tactical RPGs (think Dragon Age: Origins for example), but it gets pretty plain and repetitive quickly due to lack of characters to form different parties.
Bottom line is... if you're looking for a good story, sure, get it for a decent price. Otherwise, there's other RPGs out there that do it better, be it graphics, gameplay, voice acting (and also have excelent stories to boot).