Went there last year and am going back this year. I live in Northern Indiana near Notre Dame. Pretty easy drive from there.
Was actually pretty impressed with it last year. Not really a bad seat in the house.
If you haven't bought tickets yet, call the Butler Ticket office, DM for number. Their fees are a lot less expensive than Ticketmaster. I got 3 tickets for $50/ticket and each ticket was like $4 in fees.
They really pushed their 5 ticket package this year so individual game tickets were very few left. The upper level (300?) is bench seating and anything below is seatbacks.