I can't speak for IN THE HEIGHTS, but I did see CYRANO in the last row of the Rear Mezzanine in the same theatre, and the view was excellent.
I tend to be an Orchestra snob, so I was worried about being so far away, but I was pleasantly surprised.
I think you should be fine.
"Winning a Tony this year is like winning Best Attendance in third grade: no one will care but the winner and their mom."
-Kad
"I have also met him in person, and I find him to be quite funny actually. Arrogant and often misinformed, but still funny."
-bjh2114 (on Michael Riedel)