In 2018, the Argonne Tandem Linac Accelerator System (ATLAS) expanded its ability to produce and select radioactive in-flight beams through transfer reactions with the addition of a magnetic chicane for beam momentum selection referred to as the Radioactive Ion Separator or RAISOR. The ATLAS in-flight system consists of a production target positioned immediately upstream of RAISOR, followed by an RF sweeper to further refine beam purity. In this contribution, we present our experience operating the ATLAS in-flight system, operational and facility improvements, current limitations, and upgrade plans.