Man these fares are okay if you can get a seat at booking but if not, it auto-assigns you usually to a middle and you cannot ever change it. I'm literally at the gate 15 minutes before boarding with an auto-assigned middle and asked if I could swap, GA told me the window seat right next to me is open but I can't move to it; she told me to cross my fingers that no one gets assigned to it. I feel like at some point it stops being beneficial to hold non-middles....