We came to Mirissa for 9 days and were looking for two double rooms. We found this place and they offered us a whole second floor which included 2 bedrooms, and open plan kitchen with big dining table and a living room with place to sit and chill.
The place was very clean. The owner of the guest house was very nice friendly and opened.
You can always talk to him and ask for any help. He helped us to find a tuk-tuk for a reasonable price and a van to the airport.
The Mirissa beach is just 5 minutes away, also not that close so you don't hear the ocean at night, and it's far from the main road, so no noise from the vehicles.
We really enjoyed our stay in Pethminro Rest and would definitely recommend it for others!