I just sat in the window exit (15 A), and I didn't like it at all. Aside from no left arm rest, no recline, and only one window, there was no window shade! I sorely needed one on the midday flight. If I recall correctly, on the other models, the window shade on the exit row window goes from the bottom, up. Also, nearing landing, water that had frozen/deposited then melted trickled from somewhere on the exit door. I looked, and it was occurring on the adjacent exit door, too.