Pros
The team is great, and the location and offices are nice. For the most part, the artists, designers, programmers and testers are all great and friendly. In fact, everyone not in management is amazing and caring and hard working. There is food on-site which is pretty good, even if the cook's kitchen hygiene could sometimes be called into question. And, the atmosphere is really great, or it was before they fired and laid off almost 40 people at the start fo the year.
Cons
The three executives that run the company are terrible. They mistreat employees and are constantly lying and changing direction and vision. They pretend they want to make quality games but do nothing except look for ways to make a quick buck, and often on the backs of employees. On two separate occasions when they failed to sign new contracts they conducted mass firings (instead of lay-offs) to avoid looking like they had financial trouble and to avoid paying severance. This shows a real disregard for employees and is a real example of the executive's lack of integrity. These "firings" had no merit and no documentation and came out of the blue. Your job will never be safe at Hibernum. Additionally, of the three executives, one is a used car salesmen type that is always playing the big shot, running off his mouth and ruining his and the company's reputation in the process. The other is a ghost that is barely there and no one even knows anything about the third besides that he seems to look down at everyone and never speaks. There is also quite a bit of whispering of other unethical and immoral business practices going on but, I won't speak to things that can't be confirmed. Just looking at the mass exodus of people over the past month should be enough to know and see something negative is going on. Lastly, the things that should be most important for a job in games is the projects and they have trouble there too. About 80% of projects there are bread and butter games that are soul-crushingly uninteresting for people. And, a few select employees (friends with the managers or threatening to leave) get the good games that make no money but at least make them happy. So, unless you play the game and get in with the bosses, chances are you will work on stuff that is severely below the cool things you see on the website.