Great Snow, Superb Staff, Excellent Maintenance, Expert Terrain
None to speak of
I will preface this by saying I have not yet ridden at either Jay Peak or Stowe, widely regarded as 2 of the best in the East, but to this point, Sugarloaf is by far the best Eastern slope I've had the pleasure of riding.
I made it to Sugarloaf on 2 occasions last year, once in January and once in March. Both times, conditions were immaculate, with a groomed New England base, and loads of loose snow on top. The snowfields were open for the March trip, and were worth the trip alone, if only for the experience of riding above tree line. Lifts are fast and efficient, though a base to summit Gondola, directly in place of the old one, would be a very welcome addition.
Top to bottom rides can last 20-25 minutes on the cruiser intermediate trails. The views are amazing, spanning at least 3 states, and visibility into Canada from the summit.
The food is amazing, especially at The Bag, which is a great spot for an on the slopes lunch OR apres-ski. The village itself makes up for the less than great nightlife, though there are a few decent pubs and restaurants in the Carrabbasett Valley as well. Make no mistakes about it though. If you're coming to Sugarloaf, you come to ski/board first, party second.
I haven't a bad thing to say about this mountain. If I could give the downhill terrain 7 stars, I would. As good as Sunday River is, Sugarloaf is 10x better, and well worth the trip into the remote Maine wilderness.