Saw the Indians play the Baltimore Orioles on a weeknight. I would assume I have had these seats before because I prefer sitting along the upper first base side as opposed to the upper third base side. There are a lot of sections in all at Progressive Field, mainly because the rows don't have as many seats in them which is a plus.
I recall having steep steps to climb but that only seems to enhance your view of the field and allow fans to see over the row in front of them. Every seat had a cup holder, thank goodness. We sat above 12 rows up which was in the middle of our section. There was also a pretty cool concession near our seats that served Strickland's Frozen Custard which is awesome to have on a hot day game.
Overall, I would probably give section 537 3 out of 5 stars. If you want to sit upper deck, always sit behind home plate for the best vantage point.