It can be absolutely awful at times, at my KFC if it's busy the managers will start shouting from in the kitchen "GET THIS QUEUE MOVING!!!", and we're constantly told we need to move faster, even when it just isn't physically possible. The restaurant manager shouted at a new member of staff who finisher her shift with tears in her eyes, and she also made one of the experienced members of staff actually cry when she literally shouted at her in front of all the customers and staff when she was 'moving too slow" - she then was told to go home because she was in such a state.
But don't let this put you off - I reckon this is just my store. Since it's a franchise the manager is under a lot of pressure to make money, although nothing justifies treating your staff the ways she does!
To be completely honest, the hours are bad, the pay is just over minimum wage and, contrary to popular belief, you don't get any free chicken! It is, however, a bit of an extra money which does quickly add up, especially if you get paid every two weeks like me. If you really need the money there's no harm in giving it a go. For me, I was on trial for 4 weeks, and in that time I could be fired without notice, but I could also quit without notice and that would be that. So if you take it and then really don't like it - quit! If you find it OK - you've got a job!