I guess that I got lucky when I skied in Superbagneres in January 2011. The snow that fell in late November had pretty much disappeared by early January apart from the well kept pistes. However, the day after we arrived we had 12 hours of heavy snow, giving a good 20cm+ on the mountain. The rest of the week was brilliant sunshine :-). However, this shouldn't disguise the fact that the snow is quite unreliable and the resort offers few challenging runs. Even though we had the new snow, a lot of runs remained closed when we were there and for an experienced skier boredom will quickly set in.
The restaurants next to the Grand Hotel at the top of the gondola are ok - usual French offerings - but definitely nothing special. I spotted a sign for a pizza restaurant which seemed to be part of the Grand Hotel but this was obviously in a previous life and was only offering warmed up burgers and chips.
Bagneres de Luchon is a great town though, offering something for most visitors. However, even there it is a bit dead compared to other resorts - much better in summer when it is geared up for cyclists!