I really liked this from a DM's perspective. My player wanted was new to the game and wanted a tanky character who punched things and couldn't find it RAW so he googled something and found this. I really like how the abilities are not too different from many of the fighter abilities or the monk abilities and feels like a blending of the two classes without over crowding. All the subclasses feel very diverse and just give a very satisfying and punchy character.