Let me say that you haven't witnessed the passion of soccer unless you have been to a Boca Jr. game. To get your hands on tickets is a bit pricy (and could be difficult), but was worth it for the experience.
First off, the stadium itself is rich with history and tradition. Going on a guided tour and visiting during the day time is educational and interesting. You will get to see all those players, coaches and teams that have built the culture and tradition of the team.
Going to game ended up being the highlight of my south american trip. The atmosphere was electric, and the energy can be felt long before entering the stadium. A couple blocks before the stadium, crowds of people are gathering and walking towards the game, with music and drums playing closer to entrance. We then noticed riot police and fences set up and found out they were there to prevent visiting fans from clashes with local fans... that's when we felt a bit nervous. But after watching for 10 mins, there was little worry for rioting, as the fan's passion is expressed through shouting, cheering and singing for their team. (However, I can see how the fans can get rowdy, especially if alcohol is involved... that's why they don't sell any alcoholic beverages on game days - For this reason, I don't recommend this experience for kids.)
We didn't want to pay the high premium/mark-up by not getting tickets through the hotel (a mistake in hindsight) and tried to get scalper tickets. However, in order to watch a Boca game on the home side, you need to be a member and show your membership card before you can get in the stadium. That's why you need the hotel to make the arrangements to get you in the stadium (However, they may get you there earlier and may miss the atmosphere... not sure how they work). We ended up getting tickets for the visiting team (which you don't need a Boca Jr membership).
Hope my post helps you into the game and that you enjoy the experience!
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.