The staff: evil? Not really.
For the most part, they've been nice, some more than others. Some inject and you feel no pain, others will make you cry in pain and will leave you with a nasty bruise.
Mind you, most of them are Licensed Practical Nurses, which is not the same as a Registered Nurse, so don't expect a medical specialist.
A few have been a little daft. One nurse once told me that my urine was not showing ketosis because I hadn't had enough water, therefore the ketostix showed a darker colour. She basically could not have been more inaccurate. Yes, if you don't drink enough water, your pee stick turns darker...but dark ketostix = high levels of ketones = ketosis. I had no color on my stick = no ketosis. I was momentarily confused and just decided that she was too. They took my fruit away, I cried on the inside.
They always say my name wrong which drives me insane. That's just me.