Pros
This is a consultancy company that works mainly for the European institutions through the framework contract that they have. Working for the institutions is good especially if you want later pursuit a career as a civil servant , this could be a good starting step into the EU buble. Usually it is possible to work as a Freelancer or Employee i would advice freelance because cronos adds nothing to the table if you are competent in what you do, in IT you won't be out of job and the European Institutions are a very stable client. Position in the European Institutions. Overall if a career withing the EU Buble is what you seek, it might be a suitable company if you work freelance.
Cons
Lack of Transparency, do not explain how things work, no career support nothing. No Culture whatsoever Poor on boarding, as said before nothing is really clear with them. As with other consultancy companies at the end of the day, you are a number for them. Low Salary if you are an employee. Adds nothing in terms of value, only if the contract with the client expires they will find something for you and you won't be out of a job. European Institutions in technological terms are behind in many aspects and IT is not their priority, but this depends of where you are placed.