I use them for work and wouldnt want to be with out them, but in the same way that i wouldnt want to be without my IDE, and internet connection, and/or a manual.
Where i find it shines is as a rubber duck. It helps me consider other approaches that I might not have thought of alone. I also think it shines in the situation where you kind of know what you need, but arent deeply familiar with the concept enough to know where to begin a search.
If you dont know anything about how to do something, its way better than a search. If you do know how something works though, its clear how wrong AI can be.
TL;DR: its an excellent little buddy to act as an assistant, but it aint got the chops to do the real work on its own.
The incantation is "heil hitler"