I have loved working at Aon. The offices are all so friendly, bright, clean and well decorated.
The staff here are all kind and generally tend to socialise a lot across business units.
The benefits package is brilliant and the flexible working is exactly what you're after!
However, if you're in a creative role, Aon may not be the place for you due to the fact that they don't invest enough in their talent to retain it. Creative/Marketing salaries aren't great here compared to the other arms of Aon, but it's generally better than the market outside of Aon. Especially if you are a junior!!
Valuable experience to be had here though! Walking through the doors all those years ago, I didn't know half as much as I do now.