Pros
There's a lot of good reasons to work for Goodwill. You get to work for one of the most effective nonprofits in the business, work on big and important projects, and often work with really smart people.
Cons
Goodwill, like most nonprofits, is perpetually understaffed. Unlike most nonprofits, Goodwill has no excuse for being understaffed, as there is a bottomless well of grant opportunities, but the vision for that is very limited. Being understaffed means that you will constantly have work added to your work. When that happens, your work will suffer. Managers will tell you that you need to focus on your core work, so you do, and then they ask why you are not involved in various other working groups and side projects and on and on, so you join one of those various working groups and side projects. Then the managers question why your core work is suffering. Burnout is very high.