Here is the interesting truth about the Kuaimai driver: It isn't broken. You just aren't thinking like a Chinese factory worker in 2013. Installing a standard printer (HP, Brother, Canon) is a sedate affair. You download a 600MB bloatware suite, restart your computer twice, and log into a cloud account to buy ink.
It just prints. 150 labels per minute. Without fail.
Kuaimai doesn't bother.