Stayed at Mary's for two nights this Summer holidays with my two young sons, aged 4 and 6. Mary's communication was great throughout, and was flexible in being around at the right times to greet us when our ETA changed due to kids getting carried away at Belfast Zoo.
Mary happily moved beds around between rooms so I could sleep in same room as the kids. The breakfast was superb on both days. Homemade scones on day one and on day two the real treat of homemade soda bread - brought back some happy childhood memories.
Mary and family (Inc Jules the very friendly dog) were very personable and happy to answer queries about good places to eat and right shops to go to for certain things.
Entry with keycard regardless of hour was excellent as meant we weren't tied to returning at a particular time.
I can't stress how great the location is. Even with a 4 year old in tow, it was a 5 minute walk to the beach, and 10 minutes to town centre.
The place was spotlessly clean also. Thoroughly recommend.