Hi,
I know one member personally. His application was refused as his wife (PR) left Canada for more than 3 months after applying for him. His application got refused at last stage when they asked for updated information "Where PR lived after filing the application". As per my discussion with him, Her wife got sponsor approval in June 2015 and left Canada in July 2015. She came back in November 2015 but they got refusal in Jan or Feb 2016. They applied again and Got visa in November 2016.
That's what he told me over phone. I think other senior members of this thread are also aware of his case. He was on this thread with "Imran364".
Thanks,