maybe small things ok, but i can tell you their electrical s

standards have a big problem -

i bought a charger on ebay.  its spec says  output 100a at 12v, but the cables were only 8 awg and welded on.  if you are in the us, you would know according to NEC (north america electric codes), awg 8 is only passing 55a safely.   when i hooked it up  to the battery  and started charging, in a few minutes it smoked and quickly started an open fire from inside the box.   luckily i was nearby so i pulled it off right away.   

my rule - if i need to buy a chinese electronic/electrical  device, very rare case though, i'd only consider those with UL or CE certification on it.