We stayed for a week in a 2BR condo (J103) in ski season. Staff here is helpful, energetic, and cheerful. The shuttle service they run is quick and very convenient, especially if you're carrying skies, groceries, or other shopping. The Gant is only a quick three block walk from the center of Aspen - very nice when the weather is good. Close enough for convenience, yet far enough to avoid the noise of town center.
For skiers, the Gant is a five minute walk to the Aspen Mountain gondola and a block further to the hub of the free bus system that you can ride to Snowmass, Highlands, and Buttermilk. Of course the shuttle will get you to the gondola or the buses in a couple of minutes without the walk.
The condo was in great shape, clean and well maintained. Had ample dressers and drawers for clothing and gear - far more than in any other similar vacation rental I can recall. Kitchen was well-equipped. Furniture was generous and comfortable. Flat screen TVs in living room and both bedrooms.