I know that the company I work for checks credit, and I get what they're looking for. I've never been the one making the decision based on that, though, so I don't know how deep they actually look.
One stupid thing about credit rating is how it's separated out into types of credit. Apparently being good at making monthly payments for one type of thing doesn't mean you'll be good at making (smaller) monthly payments for another type of thing. The first time I bought a car from a dealership, I had that problem. Even though my credit score was nice and high, good credit through and through, including a fucking mortgage, they wouldn't give me a loan for a car simply because I'd never taken out a loan for one before. I got the car, but got bent over on the interest rate. Didn't have that problem with the next car I purchased.
One stupid thing about credit rating is how it's separated out into types of credit. Apparently being good at making monthly payments for one type of thing doesn't mean you'll be good at making (smaller) monthly payments for another type of thing. The first time I bought a car from a dealership, I had that problem. Even though my credit score was nice and high, good credit through and through, including a fucking mortgage, they wouldn't give me a loan for a car simply because I'd never taken out a loan for one before. I got the car, but got bent over on the interest rate. Didn't have that problem with the next car I purchased.