Peter (and his son Rian) are great hosts. When we arrived Rian showed us around the castle and gave us a little history and insight on what it was like growing up in a castle. Later Peter visited with us to make sure everything was okay and share lots of interesting information about the castle and some great tips for hiking the Cliffs of Moher.
There were 5 of us (all adults) and we had no problems. Four people in the two beds on the 5th floor bedroom and the 5th on a comfortable couch on the 4th floor.
The refrigerator was stocked with food, but we did not need any of it. The only drawback of this place is having to go down the stairs from the bedroom to get to the bathroom.