I think that the OP has gotten the help he needed re his mother's booking, so I'll take advantage of this thread to take about Bariloche hotels more generally. We've just returned; what a breathtakingly beautiful area!

We stayed in 3 properties in 3 nights. (The one I wanted wasn't available til the 2nd night; then we didn't like it and moved on.) We also saw a couple other hotels.

Llao Llao
We had lunch, but didn't stay here. The Patagonia 1000 had booked out the entire hotel. The hotel reminds me of a grand old mountain lodge. It has a spectacular setting in great natural beauty, about 27 km from Bariloche. It is large, and offers a lot of services from golf to archery. It is the most expensive of the ones I'll mention, from $200 going far north.

Design Suites
I booked this on hotel.com for $107 plus tax for a standard room. This was a nonrefundable rate. The hotel was the winner of our trip. It is about 2 km out of Bariloche, sited on a hill overlooking the lake. The main building, with all the public facilities, has a gorgeous view. The restaurant/lounge has lots of inviting places to sit with a view. There are 2 free internet terminals. The hotel has very contemporary decor, while remaining very comfortable.

Rooms are in 3 buildings that are higher up the hill from the main building. We were upgraded to a one bedroom suite, which would normally cost $190 plus tax. The suite was huge and comfortable, with a great room that included a fully equiped small kitchen. The closet was walkin, off the bedroom, with space for two suitcases. The view was marginal as we were looking across other buildings. If I had paid for a suite, I would have asked for a better view. Again, the decor was contemporary, with interesting touches such as rocks used as the knobs for your coats. The only downside to the suite was that there was one telephone, by the bed. If you were in the great room, it was difficult to get to the phone while it was still ringing.

I appreciate those of you who wrote about this property on this thread, as that is how I learned about it.

Aldebaran Hotel
I wrote about this hotel above. Based on the description in National Geographic Traveler, I expected to love it. It was nice, but not all that.

First, it was a lengthy drive down a dirt road. It was about half an hour beyond Design Suites. My husband didn't like to return there in the dark, because of all the turns required to get to the hotel. Yet all the restaurants are back on the main road that leads into Bariloche.

We had booked a suite at $240. It was on the lower level, and looked into a planted area, rather than at the lake. We asked to be downgraded to a room with a view. We ended up with a very large, comfortable room (room 1) with a spectacular lake view. From memory, this cost $180. Their free internet terminal was the one used by the receptionist; I found it awkward to have to ask her/him to leave the reception desk so I could use it. The hotel isn't sited to maximize the view. Our room had a spectacular view, but the restuarant, bar, and lounge area had partial views, as they were set back a few feet from our room. Thus, when looking that direction, the view was cut by the protuding wall.

Penon del Lago
This is recommended above, and we checked it out. It has extensive grounds, and if you have children, has lots of land for them to run off energy. However, the room we were shown had 70s decor, and we decided not to stay. I suspect that room quality can vary; if you want to stay there, you should check out a range of rooms. It is roughly $150.

Nido del Condor
We got a junior suite (room 33) with fully equipped kitchen and a spectacular view at this hotel for about $150. Yet I really can’t recommend it. There is enormous variability among the rooms. We were well content with ours, but would have hated the other 2 that we saw. Only book it if you can see the room first. Our room had a wood burning fireplace which was fun. We pulled up the easy chairs in front of the window and read our books while occasionally looking out at the gorgeous landscape.

Our room was freshly remodeled, but the clubroom was not. It wasn’t a place to hang out, unlike that at Design Suites. And the internet terminal had a monitor circa 1990. Still, free internet is always appreciated.

We also saw a beautiful property about an hour north of Bariloche.

Hotel Correntoso, La Angostura
If we hadn’t already put a deposit down on Nido del Condor, we would have stayed here once we discovered it. What a gorgeous place! The hotel is beautiful, and the location is spectacular. The hotel is nestled all alone on a lake. We saw people fly fishing right off the shore. It has two restaurants, one a casual grill restaurant by the lake, and the other a gastronomic restaurant in the main hotel building. We were well pleased with the quality of the food. It has a lovely great room lined with bookshelves on one side, and windows to the lake on the other. It also has a deck area, again overlooking the lake. This hotel has done everything to maximize comfort while giving you the best view possible from every location throughout the hotel. We were highly impressed.

High season is 8 months of the year. Rates range from $158 (mountain view) to $280 (suite). In low season, they range from $134 to $238.

This property is worth strong consideration.