Sat in 524 last season for the Ravens-Denver Broncos game in what was maybe the funnest game I had been to (when it started). The Ravens got whopped pretty handily but I would do it over again if I could. Plus, the Ravens definitely got payback at the end of the season when it counted.
We were about 6 rows up. Just excellent seats because we were so close to the tunnel for a quick exit. Row 6 will give you very few steps to climb too but was annoying because there were so many fans walking up and down the aisles to enter and leave from the concourse. You will notice it in your peripheral vision. Yes, the upper level is steep but that's part of the experience and only gives fans incentive to purchase lower leve seats to their next game. Was plenty of restrooms and concessions outside of our section, never really had to wait for either except for a few minutes before the game for my first beer. They've recently re-modeled the concourses which really made the stadium look even newer. 14 years later, it still looks and feels new.