Wow, we loved Sugarloaf. (compared to main building)
Maybe part of why I liked Sugarloaf is that we had/used a car. We only used the monorail for MK. when we tried to use it to go to Poly, it was down. It was very easy to duck out of Sugarloaf to the parking lot.
Sugarloaf is closer to the bus stop/QS restaurant. Food is basically the same. The benefit of the main building is the music (If you like the live music) and the convenience to the fine dining/monorail platform. The service was about on par with most other CL's.
That said, While GF is nice...it's not my top resort, especially if staying CL, and considering the extra cost. GF is not significantly better than Poly, CR, BC, YC, or Bwk, in my opinion. Actually, the very best CL staff are at WL and BC.
The food offered at all CL's is effectively the same, especially at breakfast. The evening appetizers/beer/wine selections are slightly varied by the theming of each resort, but all are about 80% the same. GF had deli turkey (but only in the AM? Go figure!) AKL has outstanding food! All have Bud Light, some sort of white/red wine, the same cordials. I think GF has slightly better afternoon snacks (like at 'tea time') but we were never there then. It's hard enough to get back for appetizers.