It depends on what you are into. If you are into the autographs and pictures and memorabilia, then it is worth it. But there are going to be long lines for the autographs and pictures - especially for Bruce, Phillips, and Votto. You may stand in line for two hours and not get what you want. There's always some kind of stage show going on with Reds personnel. The gift shop is there and they do sell certain items at a discount - although rarely any of the popular sizes. There's tons of memorabilia there - including a lot of non-Reds stuff. Saturday may be worth your trip since it's basically all day whereas Friday's only a few hours and you're going back that evening anyway. It's worth it to go - especially if you've never been there - but you may want to wait until you can get there Friday night, go all day on Saturday and either leave afterwards or leave on Sunday.