I agree with what Bones and Nerol have written as that gels with my own ward experience. The things I would also add are that ward culture and team dynamics are really important in making staff feel secure and able to do their job. Training, supervision and general staff support are also things to keep an eye out for if offered.
IME if the organisation values its staff and fosters a positive culture, restraint and coercion is generally less as service users are treated with dignity and respect so often don't need to act out as much. When I supervise ward teams I usually encourage teams to consider aggression and other unwanted behaviours as a form of communication, so we will often do team formulations around what the service user is trying to communicate and how we can reduce aggression/ understand what works with the patient. This is especially useful when people are in under section, so there are major issues around power, threat, meaning and control going on for them.
Ward work can be daunting, but really good material to reflect and grow on. Looking back, I wouldn't change those experiences for anything.