We stayed with our kids (17&19) just before Easter. With a private transfer we took just over 2 hours from Geneva to get to the hotel. The tone of the trip was set by the friendly manner in which we were welcomed both by the reception staff and later that evening by the Hotel Manager - something that is not common in many ski hotels. Arriving about lunchtime we ate on the terrace; the food was good and served promptly. The terrace is a pleasant place to sit, with fires and rugs on the sofas for when it is cooler. The outside bar has see through side curtains that keep the heat in while you can enjoy apres ski beverages (A large beer is half price at 4 Euro between 4 & 6pm) or lunch.
We had a couple of Valley facing rooms which was not a problem as they were on the side of the hotel and we didn't spend a great deal of time in the rooms The rooms were well appointed but compact, pretty much in keeping with a ski hotel. The beds were comfortable and the bathroom had a bath and combined shower with a movable glass screen. There was a separate WC from the bathroom. Storage for clothes was fine for a weeks skiing.
We were on a half board option which saved the age old dilemma of finding and booking a restaurant every evening. Breakfast consisted of the usual continental clod meats and cheeses, as well as cereals, yoghurts and breads. Cooked breakfast available to order was usually served promptly. The evening menu was very good and more that adequate choice for a weeks stay. Including starters, regional specialities, meat fish, a cheese course and a great range of typical French deserts. Every evening in addition 'specials' were offered (starter & main course). The seafood evening as others have mentioned was very good. The attention of all the restaurant staff was first class and service was consistently delivered with a smile! The wine list was extensive and despite what others have said does contain some wines from outside France (though I'm not sure why when you are in France you should want/need to search these out.)
The downstairs lounge is stylishly decorated and a great place for a pre or post dinner drink. The waiter service is first class and complementary appetisers were served with drinks each evening.
The ski room is is the basement of the hotel and your skis are set outside each morning for you to pick up. The boot racks are heated and make sure boots nice & warm in the morning. From a short walk up the steps the Ariondaz bubble is a short 100m ski across to. If it is busy you can just as easily grab the Marquis drag lift if there is a queue. From the top of the Marquis you are a short ski to the Signal chair lift.
In summary we as a family are experienced skiers and have stayed in many different hotels over the years. While this is the first time I have stayed in Le Portetta and can safely say that I would have no hesitation to return