The price is right! (priceS)...
Qi is a go to place for many of my staple needs - organic rice, dha, cereals, snacks, nuts, jams,...
Most of the people working there won't be able to answer specific questions (i.e. Is product A or B, better; what is good to use for x skin condition...)
However, there is a male worker there, I've only ever seen him in the daytime, and he's knowledgeable. The others seem to be guessing their answers; they're just people who work there, neither trained to be, nor are, health buffs.
That said, you'll find enough variety in this store, and... the prices are (generally) right.
Sometimes the walkways are narrow, but everyone seems to figure out how to respectufully get past each other.