Superficially, the ballpark is great and it's a unique experience to be so tightly packed and close to the action. I enjoyed that experience immensely, especially since the Jays won
Don't leave your seats though because the concession areas smell like vomit and urine, are cramped, and are full of garbage. For the women, you won't get into the washroom for the entire game.
I can live with all that, it's an old ballpark and I hear that they have done some work since I was there in 2005. The fans though just ruin the experience though. As I said, they don't even know the basic rules of the game or any players outside of their own team. They also use more obscene language than I have ever heard at a game. It's not a place for children and we were a little afraid after leaving the ballpark, lots of threats of violence.
My suggestion is to go on a Sunday afternoon getaway day. Take in a nice afternoon game, as you don't want to be in Boston at 10 PM. Then the next day, take an actual tour of the park. The history is overwhelming and incomparable, even better than Wrigley. Old Yankee stadium would have been close, but it's not the same now.