Great trip with beutiful view of the Flatdal landscape.
The walk up to Bindingsnuten takes 2 - 2 1/2 hour. You start at 160 meters above sea level (at a parking lot), and the top is at 767m, so you have to climbe more than 500 meters. However, the path is not difficult.
At the top you have a fantastic view, if the weather allowes.
Bring some varm clothes and good footwear and the trip will be troubleless.