Per and his family was very very kind and hospitable. The room was big, clean and cozy. Wifi, nice hot shower, delicous breakfast, laundry...meet every need I had. Per and Pernilla also gave me great suggestions of resturants, jogging route, and sight seeing spots.
The location of the apartment is perfect, I could almost walk to every place I wanted to go. Many of the famous sightseeing spots is also nearby and within walk distance. I bought a Stockholm card since day first but it was wasted because I basically walk everywhere.
In sum, it's a perfect B&B. If I ever had chance to go to Stockholm again I'll definitely want to stay here again.