Originally Posted by
nichojo
If you can grab row 29 (bulkhead) in C+ then buy the upgrade. Otherwise, it's up to you as to whether or not you want the extra 3-4 inches of space between you and the person in front of you.
As others have said, do NOT get the row right behind C+.
Row 29 is great. My brother had it (window) ATL-JNB-ATL, and he had plenty of room and no trouble getting in and out of his seat.