Got my fx888 replica from DX today. As far as knock-offs go, I think it is excellently made. It feels solid and well finished - like I imagine the genuine article would.
Internally (with the exception of quite a bit of flux residue on the board) it looks well made and neat; wires have heat shrink on the end to cover bare wire, the bolts holding down the transformer have split washers on them and the soldering looks good. However, I think they somehow heated the transformer too much, as the plastic 'platform' where the soldering points are has some heat damage (plastic started bubbling and has become a bit brittle).
Removing the Chinese power cord and replacing it with a European one was quick and easy. Did some soldering (lead free of course) and it seems to work well. I also got some nice reproduction tips (given the price of $9 for five 1.6mm chisel tips including shipping, I can't imagine they're the genuine thing).
DX sent it with a description of 'gadget' and a price of $7.39 with free shipping - local Dutch customs opened it and actually stamped 'vrijgesteld van heffingen' (exempt from taxes, because the value of the article + shipping is less than 20 euro). I can't imagine how someone could look in the package and believe that value, especially given it weighs almost 3 kg and a quick google search on the article name printed on the 'gadget' would've revealed quite a different price.
Anyway, I'm quite happy with it (a real one would've cost me at least 3-3.5x more). Yes, I'm keeping trade in fake articles alive but come on, making a genuine Hakko available in the US for $80 and trying to sell it in the rest of the world for 3-4x more doesn't seem like a particularly ethical way of doing business either.
Edit: just measured the resistance from the tip to the ground on the power plug - it's about 1.2 ohm. Shouldn't this be much, much higher like maybe 1M ohm? This doesn't seem particularly 'ESD safe' to me, so I might add some resistance in there.