Had to pay £25 for 'PDF' material that took weeks to arrive, and in the end wasn't actually a PDF it was a link to an eBook file you could only access from one device.
Worked for these guys for a little bit. If you didn't put hours in over the weekend, if you weren't available 24/7 then you'd get a talking to. Decided to part ways and they decided not to pay the last invoice.