This was actually our third tour with Hidden Iceland in one trip. It was wonderful, they contracted with a professional guide, Bjorn, who was fantastic. He wasn't just knowledgeable, but quite skilled in transporting our group of twelve from point-to-point in the very spacious bus. In the evening he set up his camera for a long exposure and got us pictures under the Northern Lights, which were just visible on this tour on that night.
My group was super nervous about the glacier hike component, which we wanted to do but hadn't done before. Hidden Iceland provided the necessary gear so we didn't have to buy a lot of expensive niche hiking boots and rain jackets/trousers. The group they contracted with had a great glacier guide as well, Kasha, and we got some really cool photos.
The guide also was great at recommending food at the stops, which we really valued as well.
I would absolutely book with Hidden Iceland again just based on my experiences with their guides and the home office communication (Thank you again Rita!).