There are a lot of people who love working at Slalom. Most of them come from a big 5 travel consultancy -- Accenture, Deloitte, etc. Those are companies in which they convince you you're the smartest guy in the room by association and pay really well, so that you'll be a road warrior for them and not bother trying to have a life.
The byproduct of that at Slalom is a lot of self-congratulatory bro culture where people are excited that they "only" have to bill 45 hours a week. And the catch is, projects are planned so poorly you'll be lucky to see a 45 hour week, which is completely hidden from clients who think Slalom is so great at delivering. It comes at a cost, and that is the revolving door many people use to leave after a year.
If you're ok with taking on any kind of work with any kind of company and not asking too many questions about why the work is being done, you'll do great at Slalom. Also, if you drink a lot.