I have stayed in several different apartments around the Niseko area. Flow Niseko is run by a Holiday Niseko, a smaller tour operator.
Check in process was smooth - we arrived after hours and never had any face to face interaction with the staff, but were given a code and instructions ahead of time, and had no issues.
The apartment was comfortable and looked as advertised, with all the amenities we needed, including laundry, kitchen utensils and etc. There are two bathrooms, one per bedroom, which is great. Parking space is available outside the building.
A few minor issues which made it not a five star (but none are deal breakers at this price point):
- The rooms were very small. Basically there is space for the bed(s) and that's it. We could touch all the walls without leaving the room and there definitely isn't space to lay out a suitcase.
- There is no elevator in the building, we were on 1st floor and kept our skis at the rental place so it's not an issue. But for others it may be a bit of a pain to lug their gear up two flights of stairs after a long day out.