More specifically, do I want one?
I already have a thermy so wondering if it would be overkill. The issue is you have to be home when cooking in the thermy. I'd love to be able to chuck some stuff in a slow cooker in the morning and come home to a nice healthy meal in the evenings instead of a cobbling crap together when I'm tired.
So, are there recipe books etc? What brand should I consider? Can you do things like a roast in one?