I had a lot of fun with this campaign! It just feels like a fleshed Out Smash Classic Mode (ironically this game also has a standalone Classic Mode, which feels redundant given) and I can say with certainty that I enjoyed the experience more than the single player content of Smash for Wii U and Ultimate combined, so make of that what you will.

My only complaints are that I hate the number of fakeout endings (one of my largest gaming pet peeves) and a glitch where I kept spawning under the platform ended a run right at the end which cost me 40 minutes or so getting back to that point. Otherwise a pretty solid experience!