Very good in helping keep track of a project from start date to completion. Allocation of tasks is also quite easy and effective.

L'indice de santé du projet Le Gantt Les droits d'accès

Even though the interface is simple (in a good way) you can get deep analysis (i.e cost analysis, resource utilization, etc). It is very easy to navigate and I recommend this tool in companies that have employee that are change averse.