Works well, as intended.
Lazervida air assist for $99.00 with the light shield. I purchased the light shield from Lazervida for $4.00 and then purchased an aquarium pump comparable to the Lazervida air assist on sale for $26.00 regular price $48.00.
Air assist for the laser engraver/cutter greatly improves performance and quality, however $99.00 is excessive.