Howth View B&B is one of the nicest I have ever seen. It is perfectly situated in Portmarnock to explore Dublin by bus. You can also get there by bus from Dublin Airport easily. The hostel is owned by Ann - she will give you a warm welcome and really is interested in you having a good stay. The rooms are nice and clean and the food is excellent. Ann can also provide important informations for bus travellers and things to do. When I come to Dublin next time I will stay there again - definitly!