Must feel good. Proper ownership affects every other facet of a sports club, from the advertizing to the ticket window to the players on the field, to the enthusiasm in the stands and so does improper ownership. Switching from the latter to the former can be night and day.
You'll have to brace for potentially higher ticket prices and more commercialization of the team brand -- these people spend money, and they're going to want to recoup it. But you'll see the effects of their ownership on the club almost immediately I think, especially compared to the group that came before. I bet plans are already on the board to improve the venue, revamp the scouting, analysis and player evaluation system and shake down the front office looking for possible revenue streams.
Not that everything will be sunshine and buttercups immediately, it took them a couple years to get Boston fully up to speed after all, but what you'll get immediately is a tangible sense that things should be moving in the right direction again and that the team is both more worth watching and more worthy of support. That's worth a couple extra pounds on the ticket price I'd imagine.