Leaving crock pot on while not at home?


So, I really want to get a crock pot! With the colder months coming I see so many delicious recipes I wanna try. The only thing that scares me is leaving it on all day while I’m at work. Is it safe?! I work almost ten hour days so having dinner pretty much ready when I get home would be so helpful but it also makes me nervous to leave it on for that long! Any one have any experience?!