It's really hard to tell without working there as employee. What most people do not realize, is that you need to be in a position to quit a job if you find it doesn't work for you. Too many people live paycheck to paycheck and are not in a position to do this.

Look into their employee turnover. Five people quit in a single quarter in a company of 30~ people. That doesn't require sniffing. It would choke you.