Depends. I'm mostly doing PbP now, and the adventure paths are just to long for it and to connected to each other to play them separately without loosing much of the story.
Some of their single adventures are quite good, but I prefer the length of the adventures in the Dungeon or the Worldbooks and One-Sheets of Savage Worlds for my current gaming medium.
I don't say that they are not great for many other people, just that this is not a universal truth.
Well, this is obviously my opinion and not universal truth, but I can't recall any single adventures wizards has done that I would consider quite good. But this is something I have only skimmed since I stopped playing 4e a year ago.