As a MSU alum, I have no clue what Michigan's Spring game is like, but if it's anything like MSU's then I would recommend going if you are a Michigan fan. It's a fun, laid back atmosphere to go watch a game. It's especially fun if you get nice weather. No matter what, it's a nice to go watch a football game in April. It's just long enough after the Super Bowl for you to realize that you miss football season and don't want to wait until around Labor Day to see another live football game.