Pros
Flexibility, yes you have.
Feel you are valued, until you are not.
Cons
You will get made redundant before Xmas on the Xmas dinner day. For over 2 years now they make people redundant either just before Xmas or when they have finished what they needed them to do - even though contracts are permanent. They know the law, they get away with it until they are not. Please stay away for your mental health.