What's so bad about working flex?

[tingutz]

I applied at this hospital, and they called me for an interview to either work .5 or flex as a CNA. I thought this was great because working flex would be perfect for when school starts.

However, I saw an aquaintence at school the other day that has been working at the same hospital for a few years, and I asked her if she would work flex. She said no because it was harder and you never know where you are going to be.

I've only had about 2 months of experience working at a nursing home, and I'm a nursing student. Would working flex be too hard for someone like me who hasn't had too much experience working as a CNA? What are some of the cons? and what is so hard about it in the first place?