There's less generally frustrating "gotcha" moments in the levels for this one compared to Mega Man 9, and the robot masters' rock-paper-scissors is often easier to deduce, which gives me a generally higher opinion of this one compared to 9. However, when you've only got your buster to work with, I did find that the bosses were abnormally tanky against your buster to the point that fighting one without its weakness could prove to be especially frustrating and annoying.
