Wonderful holiday spent at Mary Kate's Cottage with my husband and two sons (3&4yo)
PROs: immaculate, generally very well equipped with plenty of spare blankets, good sized bedrooms with plenty of storage, quiet and safe location for our boys to play outdoors, plenty of space in the laundry outhouse for storing bikes, two sizes of teapot BOTH of which poured perfectly(!), nearby quiet beach is a gem with a superb little beachside coffee hut (although you'd be doing well to walk it in the suggested ten minutes, especially the uphill walk back!)
Things that would have made it EVEN better (please note these are such teeny tiny things and did not at all lessen our experience!): coat hooks by the back door, a few more store cupboard staples like olive oil etc, some laundry detergent (even with an honesty box to pay into), a bigger settee for cozying up on for movie nights on wet Donegal nights, a better vacuum cleaner, more head space at the base of stairs (an absolute impossible task!) to save my 6ft2 husband's poor bashed head!
But again, these such are totally minute details and def didn't detract from our holiday!