When visiting Vegas, this is a great place to visit during the daytime to get away from the casinos. I see several reviews that call this place expensive, but try doing a search online of prices at other ski/snow parks, you will see this place is a bargain.
Best advice is to come real early to get the most out of your day, also to beat any crowd that may show up around lunch time. Renting your equipment/clothing does kill about 20-30 minutes, so even more so you want to come early.
Even if you know nothing about skiing or snowboarding, the views of the drive up there and the park/mountain itself are gorgeous.