We only stayed one night at Leon's parents' house and everything was as described. It is a bit of a tight fit for 3 people (fine for 1-2 nights) - but we received all this info beforehand from Leon, so it was fine. I think it works well for two people for a longer stay as well.
We did not get to meet Leon, but his parents were very kind and had some great tips for us regarding the Ring of Kerry - we went there and really loved it. My mom and I also went to see the Gap of Dunloe in the evening, just before dusk and it was very impressive.
We also got to meet some of the dogs and received some kisses from them ;-)
All in all, we would highly recommend staying with Leon and his parents.