These people are great!
I have been bringing small groups of students to Iceland for the past decade as part of field studies of environments and the people who live in them. Hey Iceland (AKA Icelandic Farm Holidays) has provided us with amazing places to stay around the island that have met the needs we had perfectly.
They are informative and accommodating and really understand the uniqueness of each of the farmhouse/ guesthouse/ accommodations they represent.
Highly recommended for newbies headed to Iceland but also for those who have been to Iceland and have ventured beyond the Golden Circle.