OK, my update on this pump:
JOY!
It works well! And reasonably fast. My “50% louder” claim above was exaggerated. It’s really only slightly louder than the previous pump. I deflated one tire to 10 psi low, then refilled it. Did it in just about 90 seconds. Pump body was barely warm, and the air hose only moderately warm. Color me pleasantly surprised.
I double-checked the PSI detection compared to my SLIME air gauge. Reading is only 0.1 ~ 0.2 PSI over actual, compared to the 0.7 ~ 1.5 PSI over actual discrepancy of the previous pump.
So it’s fast, not too loud, and VERY stable. Does not jump around. Plus, the LED light is reasonably bright (not enough for a walk, but good enough to illuminate for an inflation or tire change task.
No, there’s no “car, bicycle, basketball” mode, but changing the PSI setting is quick & easy. Definitely not returning this pump. I think I’m done for now.