It is quite difficult to land there and a special endorsement is indeed required. And not only does the pilot have to cross that roundabout with minimum energy to be able to drop down and land on the short runway, but there's really no go-around once you've committed to final as you fly over a funnel-like valley to get to that roundabout. If you really mess it up there's no options to divert. I got this short video once while everyone around me was diving for the dirt and I just didn't know better.