At Semetis you work in a very dynamic and young environment. There are a lot of opportunities to grow and learn fast. Their clients are very diverse in terms of industry and size. If you have to chance to work for them, go for it !
Cons
You have to like working on multiple clients at the same time.
Semetis is without doubt the place to be to learn about digital marketing, digital advertising and data/business analysis in general. New joiners are given a lot of freedom right away and you get a chance to work on the big projects from day one. The many trainings make sure that you are able to have a positive impact.
There is also a very structured process in place for career advancement, which of course makes planning very easy.
The company has a very good reputation in the sector.
Cons
The one drawback that I see is the lack of a company car. This makes the company as a potential employer weaker the for example the big 4.
The extra legal benefits are quit good however (life insurance, internet at home, phone subscription, meal vouchers, etc.).