Yes, of course, a classic stew is just a mixture of meat and vegetables which you put in a slow cooker (traditionally an oven on a low setting, or a cooking pot hung well above the fire) and leave there for a couple of hours. Anything that's to hand!
I bought one for the same reason you mention.I got bored with it very very fast. Everything you cook in one tastes the same.Still, for some things (chili, pot roast) they are superb.
Do you still use it? Would you recommend buying one?