A second Amazon Go store has opened in Chicago and a third is on the way. Read more about it from ABC:
"A new 'Amazon Go' location just opened in Chicago.The new store opened at 114 S. Clark Street and will be open from 6 a.m. until 9 p.m. from Monday through Friday...This is the second Chicago location, with the first opening last month at 113 S. Franklin Street. A third is set to open in the Ogilvie Transportation Center at 500 West Madison Street."
Of course these stores don't have cashiers. You pick up your items and your Amazon account is billed automatically. Have you tried it yet?