Before squatting was banned in 2011, I had occupied the first floor of this house in Amsterdam in 2006 with a girl whom I had met at the local squatting headquarters in Amsterdam East.
The floor had been completely stripped so it was pretty basic but quite adventurous. We had to make our own kitchen, shower and toilet. We were evicted pretty quickly, and then found another squat on the other side of town where we eventually could stay for 5 years.
Back in the days you could open a house if it was empty for over a year. You'd have 'right of house peace' if you could get in a chair, table and mattress (by law) which you'd transport with a cargo bike (bakfiets). The breaking of the door would usually happen on a Sunday (when police presence is low) by a specialized team and a show of force of about 30 other squatters, just in case the police would pull a trick.