Review on 10 Pack BESTTEN Dimmer Light Switch - Single-Pole Or 3-Way, 120V Compatible With LED/CFL/Incandescent/Halogen Bulbs & Wallplate Included - UL Listed White by John Lewis

Ill start by saying customer service was quick to reply and send a replacement. Only 1 failed out of 10. Customer service was very friendly. The switches that did not explode into an electrified spark faucet work good.The attached pictures are of the failed unit. It literally exploded after being wired in, the case was electrified and it took a few bit for the breaker to trip as they dont trip if they are not overloaded. Never seen anything like it. This could have been very serious had the failure occured after the switch was fully installed. I know its budget but man. I don't like having to write a review like this, but this could have been very serious. Ill let you use your imagination.It appears to me sorting through the carcass that the metal rocker under the paddle was installed incorrectly, slipped and made contact with something. The pictures are what I have to work with. Im just guessing.I offered the unit back to the company for a postmortem, or offered to disassemble and provide pictures. Interest was not shown for either.I have 9 others installed now, they all work well (so far). But this certainly worries me given the nature and severity of this failure.It could be a one off, it may never happen to anyone else. The company mailed a replacement immediately, they were friendly. But regretfully I have share this given the potential for a much worse outcome had circumstances been even slightly different.