I've been skiing The Beav for the last two years on an Epic Pass...It's not the biggest, it doesn't have the most snow, it doesn't have any bowls, but for the intermediate-advanced rider who can stand an extra 40 minutes on I-70 West, it's always worth the trip. The grooming is phenomenal, and there are enough steep, open blues and blacks to please the speed demon. There's really no ski patrol either, so charge!
The best thing about The Beav, however, is that it seems to have a more mature group of riders than Vail, Keystone, and especially Breck...the prices seem to keep the maniacal boarders away, and the lack of a bar scene probably helps too. I recommend staying in Summit County, head up to The Beav in the morn, park in the Elk lot (it's free), bring your own lunch, although a monstrous slice of pizza can be had for $4, and they lowered the draft beer prices this year. And at the end of the day, head back to Summit County for the Apres scene, or a few night runs at Keystone.
The only drawback is when it's snowing, not only do you have to go through the Eisenhower Tunnel, or Hoosier Pass, but you have to deal with Vail Pass as well...fortunately, we have good snow removal crews out here, but there are way too many inexperienced drivers to make the crossing safe. I guess you can take the CME also, and let them worry about it.
Overall, my favorite mountain in CO...and I've been to almost all of them...definitely worth the trip.