Connecting to the USA through SAL is a breeze. You will reamin airside but have to go through a secondary security screening at the gate. Just mostly an open your carry-on type pat down. 30-40 minutes is really all you should need on a Lacsa/Taca-Lacsa/Taca connection.

No *G lounge, but if you can somehow get upgraded on Taca, the FC boarding pass will get you into the TACA lounge. Otherewise there are a couple of bars on the concourse with limited food selection. Have a Pilsner!