Working at WTW - It's OK
One of the main problem at WTW is that matrix management doesn't work. Basically, WTW is great to provide best practices to customers, but they do not implement it internally which can be quite frustrating. Internal HR systems seem to date back the 1990s.
Advancement opportunities are numerous and hard work is usually recognized. Entry level salaries are not amazing and are often lower than industry competitor. Yet, when you move up the ladder, salary increases and bonuses become very interesting.
All in all, due to the billable and sales targets, you will work long hours doing work that is most often not very interesting. There is also a spirit of ''you are on your own to reach your targets''. If you enjoy being part of a team, this might not be an ideal gig. However, WTW is a decent employer and offer good salary at Director level and up.
Good place to gain experience and go work in the corporate world after a short stint (at a client's for instance). That is the path that most of the best consultant end up taking...less work, less stress and more money.