The pricing (at a quick glance) didn't look hugely better in the China warehouse vs. their US warehouse. Given a choice between sourcing from a US warehouse and a China warehouse at < 20-25% price difference, all other things being equal, I'll buy US every single time.
First off, I'm a patriot and I buy American.
Second, while I haven't lost a while package in transit yet, I have received some packages ridden very hard, and have had 2-3 vials crushed. Also, the ten-to-infinite day additional transit time can really fuck with my planning. So I end up stockpiling a bunch of stuff just in case I *may* need it at some time in the future, which extra cost erases the Chinese WH price advantage. But that may just be my hoarding tendencies.