I just led Steel Grille, 5.9 at King Pins. I had top roped it a couple months before and knew I'd have a hard time with it, and I did. I had to aid a move I had had no trouble with on top rope. Conversely, I had no trouble with the move that had been toughest previously. Oh well, no redpoint this time, but it was a worthwhile experience anyway.
I'd say this is a quality route because it feels like it has 8 cruxes on it. There isn't just one hard spot. It's very sustained. It's a climb that is hard to forget.
If you go, take along some medium to large hexes in addition to a bunch of 2-4" cams. Placed endwise, the hexes work great where the crack flares inward and cams wouldn't do as well.