A portion of a review on The Sims 3 Ambitions by RealGamer:

Following the Sims to work has always been a big thing for fans, and Ambitions allows players to do just that. I’ll use the fire fighter career to explain. One of my brave Sims set out for work one morning and I watched as his carpool transported him to the fire station. Once he arrived, there was work to be done. The Fire truck needed maintaining so I set him to work on that and when that was finished, I got him to maintain the alarms. Then there was an emergency! My Sim ran to the engine which then drove him and his colleagues to a burning neighbourhood house where they bravely put out the fire and received experience points (essential for career progression). Back at the station, My Sim was smelly so I sent him to the work showers whilst some of the other fire fighters played a game of fussball, relaxed in the employees beds or simply took to the work gym and pumped iron before their next big call out. After a hard days work, my Sim returned home to tell his family all about it!

review here