Workload: this varies by team, but members of smaller teams have bigger workload, and if someone is on holiday or sick, it significantly increases the other team members tasks, as the deadlines are often very tight, waiting for their return is not an option.
Office environment: definitely not a neat, tidy office, sample racks are everywhere, and trainees are fighting for space to where to keep their samples. (There is an office renovation happening at the moment, so according to the plans, there will be more space, until then, this remains a CON)
Average overtime you need to calculate on top of your weekly 40h, is at least 15-30 hours/month.