Absolutely brilliant. Don't use any other tour guide or company, these guys are the best of the best. Our guide Sölvi was, as you can tell from the other glowing reviews, excellent to say the least. Icelandic Mountain Guides and Iceland Rovers were fantastic - personable, easy to deal with, enthusiastic, knowledgable, and just plain nice people. It made a huge difference on our trip, we're VERY glad we went with them!