Wow, they have the most unprofessional service! I was standing in a long checkout line, and another cashier opened the second register. However, instead of serving those who have been waiting, she started serving some old dude who dashed to the register as soon as he spotted her opening it. Me and the customers next so me were appalled, so I went up to the cashier and said "excuse me, but we have already been waiting in line". Without looking up at me she said "sorry we can't control who's next". Ummm, yeah you can. I left my groceries and went to Cracovia which is literally two blocks away next to the London Drugs, and bought the exact same products. That's how capitalism works, ya commie hag.
However, if you do go to Polcan, make sure to check the expiry dates of products, as they keep those on the shelves hoping you'll buy them.