Etop is @Paul Zhang I can vouch for the quality of his products. I ordered from him my first year. One of the neon strips (the ones with the milk white cover - looks like rope light) was defective on arrival, he promptly replaced it. One of the neon strips has a dead pixel now, but that is strip and to be expected. The 12mm pixels I ordered from him are all still working. I am going into season 4 and haven't had to replace one yet. Last year I ordered some pixels from Ray and I already had to make replacements. Could be the luck of the draw, I feel the quality is similar. I do much prefer Paul's pigtails though.
Solid vouch from me. Got 5k pixels a couple of months ago as well as pixel strip, power supplies, injection tees and all pre made cables. Fired it all up today and not 1 single issue with a dead pixel or faulty cable (all 12v squares)