Roughly, these satellites would be as bright as the sun, except at night when you're adapted to dark conditions. With the naked eye it'd just be unpleasant, because the dot is so small and smears out to a lower effective brightness, but through a telescope it's bad enough you could get eye damage fairly quickly.

With Starlink, I thought the more extreme complaints were unreasonable — astronomy is important, but it's not so important that marginal costs are unpayable — but with Reflect Orbital we're talking about costs like 'it's sometimes uncomfortable to look at the night sky' where it's really hard to imagine a counterbalancing win.