The biggest problem with TACA is a policy of deliberate overbooking. This is less of an issue in the off season but remember that many of the occupants are Salvadorans going home to visit and that is year-long. The best way to reduce your risk of being bumped is to arrive 3 hours early when you check in for your US departure.
In flight, they have the best food and drinks are free.
They also sometimes take unexpected detours to El Salvador...but the up side of that is you get to go shopping in the duty free stores.