The Visor Edge is very rugged.  I slid it off my desk a few times from 2.5' and it worked like a champ.  I also dropped it from about 5' so it would land flat on its back and another time on its corner.  No problems then, either.

The Springboard Slot

To get its thin size, the Visor Edge makes the Springboard Slot an add-on.  The Visor Edge has a grove along its sides that the external slot uses to snap in place.  Although the external slot adds depth to the Edge, no additional weight is added as the external slot weighs the same as the flip cover.

The external slot looks black but is slightly translucent.  If you look at it in the light you can see that it is a very dark blue.  The Visor Edge's cradle is also this color.

The external slot is passive and doesn't cause the Visor to do anything when you insert or remove it.  I tried it with a few Springboard modules and they worked fine.  Removing oversize modules like the Geode can be difficult, and I found it easier to just remove the Geode and external slot at the same time from the Visor Edge and then remove the Geode from the external slot.

When using the external slot, the Visor Edge is just over 3/4" thick -- just a sliver thinner than the Visor Prism.  It is easier to grip when using oversize modules than other Visors; this is probably the perfect Visor for using with the Geode.