At my time at eva never heard of anyone losing days off. Some people got sick on there days off, doctors not always fixed that.
When I was at eva, most trainers were local , like another other company just study hard and you will pass. Locals are good to fly with and professional , maintenance is top notch to, very high standards. You join eva, you quickly learn the Taiwenese way, and gets on with it. My sim partner was a yank, didn't like the Taiwanese culture and bailed after a few months.
I left in 2009 , so there might of been a few changes. Like i said, take the interview , it's a 5 days free holiday, if you don't like it, don't take the job.