I love Harmonious, and was fairly disappointed by Fantasmic. So, I guess I'm the exception to the rule.
I love characters and Maleficent and Sorcerer's Apprentice Mickey, but Fantasmic felt disjointed. I also struggled to see the water projections, as did most of my party. It wasn't terrible or anything, but we had heard rave reviews. Maybe high expectations were the problem.
Speaking of expectations, we stumbled upon Harmonious one night and were blown away. I thought it was a visual and sonic feast... Spectacular renditions of lesser used Disney tunes (sometimes in region appropriate tongue), vibrant colors, beautiful graphics, water fountains. After reading the initial reviews, I wasn't expecting much, but we still crow about it now.