Exit row seats don't have floor storage during takeoff and landing, tray and ife are in the armrest, and there is no chance of scoring a free middle seat next to oneself.
HTB.
The first 2 are not true (at least on WN) , the "infinity" seat does have the bonus of an armrest tray AND a seat-back tray, its just a bit further away.
But
#3 is correct concerning the LUV seat row. There is no extra room, it doesn't decline, IMO there is nothing special about them except a bit of" privacy" for a traveling couple.