We were a family of 2 adults and 2 kids (12 and 14). We used it as a base for skiing and found it to be well located. We had a car and drove to the ski lift and parked rather than using the shuttle bus. Leysin has a great supermarket and a good range of cafes/restaurants. Access to the slopes is very easy.
The apartment was very clean and well equipped with good bedding and it is really warm with large heaters which helped to get ski gear dried off. We cooked most nights, the kitchen is very compact but it worked well and was easy to cook full meals. The bathroom/shower is excellent, really appreciated after a cold day on the slopes. The internet connection was not reliable and this meant that the TV would not stream anything, but we were able to use it to stream through our own iPads.
Overall, it's a great apartment with a lovely view and gives great access to Leysin slopes.