I'm listening to his review now and I dunno, doesn't line up with my experience so far at all. He's comparing it to larger, more expensive ultrasonics that use more transducers without noting that they also use four or five times as much water and have a correspondingly larger volume to energize. He doesn't like the use of distilled water, which is something you can easily fix by adding a drop of surfactant (as I do) to break the surface tension.
I'm genuinely curious if some of the issues he ran into are the result of static from air-drying in a low-humidity environment. Especially since he then immediately wet-cleaned it with spray and fixed the issue.