Pros
The offer a Vacation + and Insurance plan + STM discount.
Cons
I signed a full-time permanent contract but look at what happened to me ( I have a master degree in engineering) : They do not protect their contractors. They care only about their clients, even if the client is in the wrong so they are afraid of loosing it. They treat their contractor like dirt. (i will give more insights below) They are doing some type of check-up interview in the client site to see if you are "OK" but in the end, they are just doing it for the form (fake). This is in Alten contract: If the client decides to terminate the contract , he just need to give a notice of one week and do not need to make any reason (just says contract terminated) even for a permanent position contract (which in the end do not mean anything). So you do not have any protection as a contractor and Alten will give a week or two to find you a new job with them which is realistically impossible to do. In the end, they say that they will try their best to get unemployment allowance (also fake). This is really scary for somebody who have a family to take care of, so be really careful before signing even if the benefits are tempting, think about the financial stability around your job...