Problems with 'Square'

In the past week have had one bad experience as a customer with a Square terminal and while prospecting an admission that Square is hard to use in some venues....in the former a gal at a coffee kiosk had a 'Square' terminal where the card swiper wouldn't work, the she was unable to get me a receipt or even text me a receipt. Not good. Secondly a prospect told me in an event like a concert it's hard to use 'Square'...he really needs a 'wireless' terminal like a Nurit 8020 etc...