Do the disadvantages of a burqa outweigh the benefits?

Ok firstly as far as i know burqa should not impair your sight and hearing . According to my knowledge of the Islamic laws your face should be open. Second i suppose you can take it as a disadvantage that it gets unwanted attention. See as for your third question today you could reduce suspicions by not wearing a hijab. But i believe when ever any non muslim will have a problem with you you will be called by muslim insults. Well people who are severely religious they do not care but for weak peoples like us i suppose we should try to blend in.