My stay in Oia was wonderful. The place is exactly as it looks in the pictures and the view from your balcony is unreal. It really just makes you want to sit there the whole day. The place was clean and the whole family was attentive and willing to help us if we needed anything.
The only drawback, as some other people have mentioned, is that the wifi does not really work. We couldn't use it in the bedroom at all and it seemed to only work completely when we were on the balcony. Other than that, the place is fantastic and the hosts are great. I would stay again.