This past spring was my first time at a spring training game. I can't say that I'm a huge MLB fan, but it was still a fun way to spend the day with friends. The stadium is really nice and has a great selection of food and drinks.
My only advice... it's well worth paying for seats that are covered. We sat in the grass near the outfield, which was fine, except for it being hot. We ended up leaving sometime in the 7th inning because of the sun beating down on us.
Overall though, it was a great time!