After I had bought a QI charger from Qumox and sent back because the charging is interrupted again and again, I looked at the CHOETECH stage 3 coils purchased charging mat. I am very pleased. It depends on the LG 1.8A USB power adapter original. The shop is on edge without "Slow loading" message even with Slim Armor Cases. The hotspot is well 1cmx1cm. So easy to hit. The mobile phone is at the bottom of about 0.5 cm protruding. Is so stable on the mat. However launched cross always comes a "Slow loading" message. With root and the appropriate app (G3 Tweaksbox example) you can disable the message and the cargo area is estimated without message again twice as large. But that's not really necessary. The build quality is absolutely fine. Who the LED is too bright can paint over it so. Apart from that I did not want to be device next to my bed have that wirelessly transmits power. But that's another story ... All in all a top device for reasonable price.