Review on Angle Simple Brushed Nickel Kitchen Faucet Head Replacement - Pull Down Sprayer Nozzle with Stream, Spray and Pause Modes for Sink Faucet Parts by Gabriel Rosenberg

Works well and has strong spray, but is not frozen in spray mode. The water pressure keeps it in spray mode until the water is turned off by either the faucet or the pause button, at which point the head reverts back to non-spray flow. When you press the spray button you can release it and it will stay in the sprayer until the water is turned off or stopped by the pause button. At this point the head returns to direct flow. I don't think it's a defect, just as intended. Personally, I'd like a lockout feature where the head stays in spray mode until manually switched back to default mode.