The cabin is not right at the top, but just below it, right off the South Taconic Trail. When you see the sign, you just go another 50 feet, and your on top of Alander Mountain, which runs a 1/2 mile in each direction from here with spectacular views.
While I didn't get a picture inside of the cabin because folks where still packing. There is a nice woodstove in their, and lots of cooking tools. There also was partially full bottles of liquor, among other things, but I'm not sure if I would drink it, as it probably would make you blind.
There is a free cabin you can stay at up on Alander Mountain, even in the winter. It has a nice little woodstove, and bunk beds for 6. Looked decent enough, although more people should obey the "Lug It In, Lug It Out" policy of Mass DCR and not leave all their whiskey and rum bottles there. Also, they have posted that alcohol is prohibited on cabin, something that is clearly well followed from the number of empty bottles around.