I have skied in 9 countries and 10 states, and Powder Mt is currently my overall favortie. We skied there in early January for the past 3 years and had just plain awesome skiing. Nobody believes this, but with 5500 acres of terrain, it is the biggest ski area int the US. Yes, ever bigger than crowded expensive Vail.
Powder, as another review here says, is for the hard core. 2800 acres are served by lifts. One whole mountain is accessible only by snow cat at $7 a trip, which is worth every dime. Another mountain is served by a bus as noted in another review. The main section of the area is served by 4 chairs, one is a new detachable quad. My favorite section is accessible by a short Poma lift from the top or another peak which puts you in a totally separate canyon with all sorts of options ranging from green rated cruisers to dropoffs rated double diamond. That separate canyon offers 2100 vertical feet where you may not see another skier since the only access is the one Poma lift. In January, after a week with no new snow, I still found untouched snow. My greatest fear was falling and not being found until Spring.
The food and base facilities are old and tired, but the people who work and ski at Powder are mostly locals who are friendly and happy. In ten days of skiing, I have never waited in line at Powder. When the parking lots are jammed, you can still find a lift with no line.
Mutiple day tickets are $45 for 2006-7. You buy a voucher for at least 2 days at $45 per day, then after using it for the number of prepaid days, you can buy addtional days all season for $45.
The skiing is the attraction. Not being an expert in deep snow, I love Powder because there are many runs where you can go off on your own and go in and out of groomed snow at various steepnesses. If is a hoot to run through trees in unbroken snow where it is not so steep you worry about killing yourself.
There are plans to expand the facilities at Powder, but I think this will be far off. One of the constraints is the road into the place. It is ten mile steep uphill climb. When the road has snow and / or ice, it is a tough drive. The base is actually at the top of the North facing ski area which must be approached from the South.
Have a look at their website for more details and then go enjoy Powder Mountain, but please don't tell too many people about it.