BA Economy exit row

They have more leg room which could be a positive; however, exit row seats on some aircraft don't recline that could be a negative to some on a transatlantic flight.
The following rules of exit row seats could be positives or negatives:
'When you are seated in an exit row, you may be called upon to open the exit and assist fellow passengers in exiting the aircraft if a crew member is unavailable to do so.

Because of this, and for the benefit of all passengers, Federal Law requires that passengers seated in the exit row MUST:

Have sufficient mobility, strength, or dexterity in both arms and hands, and both legs to:
reach upward, sideways, and downward to the location of emergency exit and exit slide operating mechanisms;
grasp and push, pull, turn, or otherwise manipulate those mechanisms;
push, shove, pull, turn, or otherwise open emergency exits;
lift out, hold, and deposit out the window, objects the size and weight of window exit doors;
Remove obstructions similar in size and weight to exit doors;
Reach the emergency exit expeditiously;
Maintain balance while removing obstructions:
Exit expeditiously;
Stabilize the escape slide after deployment.
Assist others in getting off the escape slide.
Be able to locate emergency exit, recognize opening mechanism, and operate exit in an emergency.
Be at least 15 years old and be able to perform these functions without assistance.
Have ability to read and understand instructions which are provided in printed or graphic form and be able to understand oral crew commands in the English language
Have sufficient visual capacity to perform these functions without assistance or visual aids beyond contact lenses or eyeglasses
Have sufficient aural capacity to hear and understand crewmember instructions without assistance beyond a hearing aid
Have ability to adequately impart information orally to other customers
Not have a responsibility, such as a child under 15 years old, unless a second parent or guardian is seated elsewhere with child
Not have a non-discernible condition that might prevent person from performing these functions
Be willing and able to perform these functions without assistance"
Not have a condition that might cause a person to suffer bodily harm while performing these functions
Not be using an assistive device (e.g. wheelchair, cane, crutches, MPEDs, cast, brace, etc.)
Not traveling with a pet in cabin or service animal

Go to Aerolopa and look up the specific plane you are are traveling on. It will give you info like seat pitch, recline, etc...

Also, all personal items must be stowed in the overhead compartment during takeoff and landing for exit row seats.

The tray tables and media screen will likely come out of the armrest. If this is the case, it could feel a little more cramped at mealtimes, in my experience. To me, it’s worth it for the extra leg room.

In addition to the comments above, my husband and I both enjoy exit row seats, however, it can get quite cold in that location. Also, because of the additional space, sometimes people like to "gather" there and chat which can be annoying.

Last summer going over from SFO, non-stop on the overnight flight, I didn't want to pay extra for a seat of my choice in Basic Economy on United, preferring to let "them" assign me the seat. At check-in I was given an aisle seat in Group 4 which turned out to be the very last row.

Fantastic, no one else was there. Luckily, my carry-on could still fit in one of the above bins.

The return flight almost the same, except my assigned seat was in the 2nd to the last row, again an aisle seat