Zero 4 is a decent game and has some improvements over Zero 3, but it also has some really questionable choices like the crafting system and the weather stages, the latter resulting in some of the most obnoxious levels I've played in Mega Man, the music isn't as good too, and many tracks have an annoying electronic high-pitch sound to it that really got in my nerves due to how overused it is. MMZ4 ends the series in a positive note, but it would benefit from some fine-tuning.