Pros
If you're a support role, a team leader or a manager, then working at IKEA for a while is great for your resume. The coworkers are the heart of the business, where upper management aren't. When I worked at IKEA I was very passionate about my job and enjoyed the role I was in, I enjoyed my interaction with coworkers.
Cons
Where do I begin? Very long hours, no support, expectation to give up any semblance of your own life, with a promise of progression that never comes. Even if you have proof of your hard work and accomplishments, it accounts for absolutely nothing. They claim that culturally they welcome different ideas - but not true, you conform or life becomes difficult for you. If you injure yourself on the job, they see you as a liability - if you were once seen as an up and coming talent, once you injure yourself or admit you can't cope with the volume and pressure of the work, you're no longer valued as an employee. Conform and don't complain. Steering. Totally incompetent and intimidating to those below them. Talk in circles, extremely bureaucratic behaviour, incite drama and arguments between departments, intimidate and bully coworkers from departments other than their own. I even witnessed steering managers taking credit for work that other people did. Then the apple doesn't fall far from the tree in Middle Management. Some of the managers tend to be sociopaths, business psychopaths - again, bully and intimidate, try to hide their incompetency. If you have thin skin, don't apply for a job at IKEA because there are mean characters everywhere, waiting to tear strips off you.