Reviews and user feedback regarding updates for this specific unit are mixed, primarily due to the discontinuation of the original Garmin Fresh Status of "Fixed" Updates for Garmin 4NSF Software Availability:
Beyond just fixing bugs, the update adds new features, such as improved recovery tracking and data health checks. How to Update Your Garmin Device
I tested it myself in the dark waters of Silfra fissure, Iceland. At 20 meters, the old glitch would freeze the dive computer into a brick. This time? The screen flickered once. Then—a soft chime. A new prompt appeared:
To fully clear out the system errors and install the functional software update, choose the method below that matches your current device state. Method 1: The Standard Desktop Fix via Garmin Express