I just bought a slow cooker because I am always on the look out for new, interesting meals to make and ways to save myself a bit of time. Right now, I get off work, take something out of the freezer, and eventually get around to eating at eight or nine in the evening. That's if I feel like cooking at all. The later it gets the less I want to eat, let alone cook.
Taking something out to thaw before I go to bed, throwing it in the crock pot before I go to work, and having something waiting when I get home in the afternoon seems like a decent solution to the problem. I don't have to put a lot of effort into it, I eat early, and there's a good chance that I might have something to take to work for lunch the next day.