I can't comment on which bus company to go with because we got up there in a rental car. But I will strongly encourage you to go if you are there on a clear day. It was the best view we saw in Norway. It is more than 4800 feet in elevation so you are on about the same level as the surrounding peaks. And if it is clear, you can see all the way down to Geiranger at sea level. Better than some viewpoints that have much more publicity. We saw many full sized tour buses going up and down the road, so I suspect all the drivers are very experienced in negotiating the hairpin turns. Have a great visit. Fjord country is really beautiful.