Sim City around the corner from Mong Kok MTR is one of the best pirate places I've found, though a friend will be taking me to 118 and some other place in Wanchai shortly.
The DVDs I've got have all been good. Most of the PC discs were too, but a couple didn't work (they had the right data on them, but the discs were shoddy so I couldn't read properly).
Not that I condone piracy... but I'm not paying near Â£5000 ($60,000) for a piece of 3D modelling software for personal and educational use.
As for the DVDs, I've only really bought things I couldn't find in the legit stores, or things that aren't for sale as DVD yet ("stolen" from the cinema copy). There's no real need to get pirate films, as the legal VCDs are so cheap anyway.