Was given tickets in row 5 of this section last season as a bonus from work. Expensive seats but then again, I didn't pay for them. Best seats in the ballpark by a long one.
We were in the last row and there are only maybe 8 seats per row so this is a great family section with excellent sight lines all around.

The outfield is just too far from home plate so I would always recommend the infield when coming to Petco Park.