Haven't stayed at Pop Century, but have stayed at HIFS, AKL, BWV, WL, Poly, Riverside and Wilderness Cabins. Pop Century is quite close to HIFS. If you have a car and are not relying on Disney transportation, I would choose HIFS. HIFS is really fun for kids, great pool and cute train ride. Plus, we found the hot buffet breakfast every morning to be both tasty and convenient. The kids loved having their own room with bunk beds and play station. The separate king room for parents is great. My parents also went along and had a suite with a separate big screen TV viewing room. We all enjoyed it very much. Once you're far enough away from the parks, I don't think offsite is that much different from onsite, especially since we always rent a car. I would definitely pick HIFS over the Wilderness Cabins, which we found incredibly inconvenient.