Same here with Acass. Not the highest paying outfit out there but they paid me in full when I worked with them. Only people I know of who have "gotten screwed" by ACASS were ones who did not read the contract then either left early or did something against the contract, and were then not paid.
Have a friend who was on the Avionico/Arik Air gig and like B200 got screwed. Seems that there are a lot of guys out there who are in that boat with this company. They pay only once a month, so they get the guys to work for a month, do not pay them nor their expenses and smile all the way to the bank. Eventually someone will go to Calgary and take them to court, hopefully on a class action lawsuit and shut them down.
BTW, the owner of Arik air has a private 604 and Avionico was crewing that bird as well. The relationship with the owner got so bad that they hired the last guys flying the bird directly and moved Avionico out of the picture. Know one of the guys there and while the duty hours are rough (read long) they are paid on a regular basis and fairly well.