Metro - you suck. You really suck.
Most of the cashiers are jerks. I don't really care for overly 'pleasant' and 'smiley' grocery store cashiers, but dealing with grumpy people really screws with my energy. Especially when you're shopping at this dungeon of supermarket. Avoid this place at all costs between 5 and 7 -- the line-ups are atricious and the credit card machines are slow as hell. It's crazy fighting for the post-work crowd before they hit the subway.
One reason why I shop here: it's open 24 hours. And the cashiers are even more 'prickish' at the 24 hour grocery store downstairs from my apartment.
And the other reason to shop at Metros -- on Tuesdays, it's $6.99 for 1 kg roasted chicken. I stand in line with the old Chinese ladies (that grab two chickens) and the lonely students for the cheap chicken. Then I stand in line to pay for said chicken. It sucks... but it's so cheap. I hate myself for coming here.