The partial view seats are true Em, but well depending on what you want to see in the production, I'm not sure I would recommend them over the rear mezz. I was in the front row on the side which should have been partial view but you know I loved it, being close to the instruments, saw that perfectly, though sometimes the center was blocked or I didn't realize who was singing, etc. The theater isn't big, so next time I go I'm definitely getting the rear mezz tix. And considering you've never seen the show(including the dvd right?) you'd prob want the full view, as some aspects may be confusing the way the production is as it is, you'd def wanna see who is singing and such.
"If there was a Mount Rushmore for Broadway scores, "West Side Story" would be front and center. It snaps, it crackles it pops! It surges with a roar, its energy and sheer life undiminished by the years" - NYPost reviewer Elisabeth Vincentelli