I'd go 4.5 if I could.
Bob is a great guy with a cozy home in a perfect neighborhood 10/15 minutes walk from the main tourist spots in Dublin. Quiet, right around the corner from St Patrick's Cathedral.
Loved chatting with Bob after breakfast. Interesting sense of humor! I'd be friends with him if I lived in town.
Nice touches like clip lamps on the bed frame to a welcoming attitude toward kitchen use. Cereals and milk for the taking. Friendly cat on site. Plenty of tourist info on offer, maps included. This is not a turn key operation, which is a good thing.
I'd be happy to stay any time.