It's hard to know where to start!
I booked this as a surprise holiday for my wife's birthday. She's an experienced rider but I am not horsey at all. The Icelandic horses are such calm, gentle and trustworthy animals that even someone with little experience can happily ride them (though I would definitely recommend some lessons beforehand if you are a total beginner; you want to be able to sit comfortably and understand basic horse control). I learned to rising trot in preparation but it just wasn't necessary. They are the perfect way to experience the country in my opinion!
The hosts were wonderful. As well as being lovely and friendly they brought so many personal touches to the experience. Their passion for the horses came through in everything we did and they had so much knowledge, I could have talked with them for hours. And it would be hard to get a more authentic experience of Iceland than to stay on a farm, with a family, eating home-cooked meals.
Organisation was seamless. Everything was taken care of. From pick-up at the start of the week to drop-off at the end we didn't have to think or worry about anything.
If you're thinking of this kind of holiday make sure you plan for the weather. Our trip was at the end of March so ambient temperatures were around zero and with wind-chill it went down to minus 10. I ended up wearing six upper layers, three lower layers, and three pairs of gloves! Make sure you have warm and windproof gear.