we have sat in rows 4,3 and 1 - no issues with any of them. Row 1 was my preference as obviously there was nobody in front who may have lowered their seat into your 'space'.
We once had the misfortune to book extra legroom seats, I think it was around row 11 on a Monach flight. The row was next to the emergency exit and it had only 2 seats either side of the aisle - not sure of the plane type. Darren will sure to know.
Fantastic legroom - the longest we had ever (apart from upstairs on a Virgin 747) however, they were great if you are Twiggy but anyone with a normal size bum had problems ! We moved to other premium seats as they were most uncomfortable we have sat in.
Chris