I've been a Champion player ever since it came out (more than 20 years...eek!), and am a big fan of Silver Age Sentinals (Tri-Stat version). That said, I think that M&M is a really good game. It has constantly impressed me with its ease of use, mostly fantastic art, and cool ideas and systems that can be swiped for any d20 game. Though a bit pricey for the page count, it's worth every penny.