The Italian process of flexibilization of the labour market has created a dual market populated by protected permanent employees and unprotected temporary workers. The latter comprises not only temporary employment relationships but also autonomous collaborations used by firms as low-cost de facto temporary employment relationships. Little is known about the quality of these temporary jobs, particularly widespread among young workers. We estimate a regression model of perceived overall job satisfaction of young workers, based on the ISFOL-PLUS 2006-2008-2010 panel. We control for the various temporary contracts and for perceived satisfactions in nine aspects of the job. We find that lack of job stability is the most serious cause of lower satisfaction for both temporary employees and autonomous collaborators. But while temporary employees compensate concerns of job stability with other job aspects, attaining satisfaction levels comparable to those of permanent employees, autonomous collaborators do not and are thus significantly the least satisfied.