Depends who you talk to ... an insane adventure .. or just another way to get around. Without knowing either spectrum we just followed our tour book guide book recommendation that said risk was relative but in their opinion the views and side adventures were worth it. Well, we did not have time to do much of any side trips to see the various waterfalls, swimming pools and blow holes described in the guide ... but the trip was WILD!
The views were spectacular and the road was pretty wild. 57 miles to get around the west end loop but the 14 miles that were single lane and 500 feet cliffs just feet from the edge of our car were excillarating and offered views of the coastline and jungle that were beautiful! Imagine driving along at 3 miles per hour with a 500 foot cliff to your left and the side of a vertical cliff almost scraping your passenger door and then having to go around a 180 degree blind right corner ... the only thing worse would have been in the car coming the other way around the corner. That said ... I loved it :-)
The little village pictured below was about 15 miles north of our resort and is a very secluded area yet the road that traverses the coast line cuts right through it. The steep road in and through and out are all one lane and requires quite a bit of that "Aloha" spirit of cooperation to make it all work.