It's a little hard to get a detailed answer here. Conditions to go to the unit site visits, see what people around the unit, such as janitorial security, small store owner chat, may be able to understand some of the unit employees can meet to talk about that is the best, the information is more objective and real.
Personal experience for reference, said their own point of view. After all, I'm not in your environment inevitably some places think wrong, said not right.