These work horribly in England. At my local M&S (a middle to upper market grocery store) the self checkout fails at some point about 60% of the time requiring a

These work horribly in England. At my local M&S (a middle to upper market grocery store) the self checkout fails at some point about 60% of the time requiring an overburdened overseer watching 25+ terminals to come over and swipe their card without even really looking what's wrong. Most of the time it seems to be poorly calibrated weight sensors or too tight a margin where product variability is not accounted for properly. Probably some stupid outsourced IT team setting a single weight for each sku and not understanding that an apple could be a few hundred grams different.