I have a sample set of these. They're not as good as the CPS chips.
The chips look grubby because there is an imprinted "shadow" towards the edge of the chip which is meant to look like a Paulson indent. Also if you look at the 25 chip in particular (though this is the case with all the chips), the green of the overlay (or whatever you want to call it) obscures the yellow of the spot.
The yellow of the 25k should be more orangey, the blue of the 500 should be more lilac, and the overall printing quality isn't great.
Close but no cigar.
Weird, because the seller also supplies EPT copies and they're actually pretty good (from what I can gather from a small sample set, anyway).
ETA: looks like the issue has been sorted where the overlay colour obscures the spot colour.