Pros
If you enjoy watching someone use mediocre NLP skills on unsuspecting innocents purely in order to induce self-destruction and mutual backstabbing, you have definitely come to the right place. Best place for schadenfreude ever. Since you will receive no guidance whatsoever, you will definitely learn if you are really a self starter within two weeks on the job. If you manage to quit before you are fired you have won at life and will probably feel empowered to accomplish anything. Due to the unbelievably high turnover rate, if you're breathing and speak English you'll probably get a job.
Cons
It's quite possible that you will witness someone truly losing it there. Unless you enjoy that sort of thing, it's hard to believe that you would be happy at Wonderlabs. Bonuses and advancement potential exist only in theory. You will quit or be fired long before they don't fulfill any promises. You might be asked to do something that compromises your ethics, if you have any. So don't work there if that's not your thing. The firm doesn't do right by clients by the way. But the clients will be the least of your concerns if you work here.