I would recommend the accommodation.
Pluses: parking place, warm inside (for drying wet clothes), clean, skiroom and boot dryier
Some minuses: lack of own WIFI (only SkiAmade but working in one room only!), host doesnt speak English, small shower space.  

These are my recommendation that will make the stay perfect:

1. Little bit more hot in the rooms. 20 degrees is OK, its not like it was cold or something but a little bit warmer would be great.;
2. Stronger stream of the water in the bathroom. I guess, it was not so strong because we were in the 3rd floor. Anyway, you can take a bath , no problem but again - with a bit stronger stream you will feel more comfortable;
3.Pillows were way too soft. It would be great if there is more than 1 pillow per person- that way you can choose or combine somehow;
4. For longer stays (we were for 14 days ) it will be great if possible ,sheets and towels to be changed. If thats not possible, the guests can be notified wit their booking.
5. Very poor internet connection :)

Overall, the house and the apartment were great. The view from the balcony is priceless. The owner and her daughter are very nice and kind. Gröbming is little village but you have everything you need there. Hauser Kaibling is less than 10 min away , Planai is on 15 min. Definitely will come back again!
 

Für einige Nächte ganz o.k. Unter Apartment hätte ich mir etwas anderes vorgestellt. Polster und Decke sollten erneuert werden! Familie sehr nett und freundlich.