I bought one of these for recording bass and guitars in my home studio. I was told if I was looking for quality I shouldn't be paying attention to products at this price tag. However, I experienced differently.
The DI box is built with quality. It got hard metal housing, it is heavy, the switches are hard/stiff which I find really nice, so they won't accidently shifts on contact with external factors, if thats the case. I can't say anything for the battery source because I'm running it on phantom power from day one. The signal is clear. No hums, no noise, no nothing. So far I'm really happy with this product - again, with really low price tag in mind!
Totally recommending it!