I'm 100% certain people have had great experiences staying off property. Not us. We had to stay off property once (Disney race weekend, no other options). Never again.
The staff wasn't Disney, and it showed. The shuttle ran infrequently and irregularly, and even passing the shops and eateries outside the park reminded us every day we were no longer in The Happiest Place on Earth.
And we love Pop. The refurbished rooms are terrific, and access to the SkyLiner is nice. And having access to Art's food court, shop, and bus service by walking across the bridge is a great plus. (It's especially nice returning from the parks. You can hop on either a Pop bus or an Art bus, whichever shows up first.)
It's our favorite value resort.