I would recommend staying at Sinead's cosy apartment. My family and I stayed only one night at Sinead's apartment, and we wished it were longer as it was perfect for us.
It is very clean and the beds were comfortable, the kitchen has everything you need, it is indeed a cosy place.
Sinead was also very accommodating about changing the day we stayed, as our flight was delayed. The apartments location is within walking distance to everything you need to see in Cong. It was always a wish of mine to see this little village and it will be a cherished memory. Thank you Sinead.
PS My family fell in love with the dog.