I've seen Starlink being unreliable (freezing during teleconferences) and I've seen it performing amazingly. The latter experience was during Starship tests, when the vehicle re-entered Earth's atmosphere and the plasma heated the tiles. Normally, re-entering vehicles suffer Loss Of Signal because their radios are unable to reach ground stations. But Starship using Starlink had zero L.O.S. and had some amazing camera views that were being relayed by the Starlink contellations. Soon this will also be available during crewed spaceflight.