Southern Coast with GreyLine is absolutely worth it! First, I picked it because I loved their schedule of the sights because we tried to do most things with light (it is winter and there are only a few hours of sun), including the Black Sand Beach which resulted in awesome pictures and nice photo lighting. And I was right. The guide was fantastic and managed to do it all. She shared a lot of facts about the local people history, storytelling of sagas, the island’s geology and more. She was kind and handled a lot of guests very well. Couldn’t ask for a better experience! Thanks to her, I learned a lot while seeing incredibly beautiful places in this must-do itinerary (along with Golden Circle). I believe a good guide is very important for a good tour. Driving was safe as well, lots of ice in the road and no problem.