They are a five star airline from the view of its customers but surely not from its employees (although there are probably a couple of exceptions)!
A bit of advice to those who do decide to go there: Keep a very low profile. Keep your nose clean. This is what I did which made me stay there for three and a half years. Several inauguration flights. Quick promotions.
The only positive bits about QR are the destinations you get to travel to and the friends you make!