I think that is a 0.001 scale, no?
I see a few people have posted on that scale before and rated it OK. To be honest though, I am not surprised if it is inaccurate when it costs about $10. I read up on reviews of scales, and it seems you get what you pay for when it comes down to weighing at the limit of the scales capability. I mean, a lab grade scale that accurate can cost tousands of dollars, so dont expect too much from these cheap import brands!
There are a few mid priced ones that get better reviews such as J scale, My Weigh or Amput.
I got an Amput one from ebay for approx $50USD and it seems to be pretty good. I'd say, unless you are on a really tight budget, get a better one.