Especially at sunset you have a fantastic view over Luang Prabang and the Mekong. But a LOT of other people appreciate that too... don't come too late, otherwise you won't see the sun but the heads of the others...
Indescribably beautiful viewpoint in all directions. The climb is very demanding but well developed. Sturdy shoes are a must. I recommend anyone who is reasonably good on foot to make the journey here.