Avantages
You can choose your own schedule. A FEW of the managers are good people who care about their teams.
Inconvénients
Management does not care about people at all, they do not provide proper training for success (but claim they do. They do not pay you a living wage (we're talking ~9 an hour for most projects), and they would rather fire entire teams of people so they can use cheaper labor from Latin America so more money goes ito their pocket. They tell you becoming an employee (aka Lead, APM, PM) is good but don't tell you that it just opens you up to MORE abuse because now you cannot pick your own hours and you can't resign from a bad project - you have to resign from the whole company!! Managers talk down to you and if something goes wrong on their end, YOU will be thrown under the bus for it.