Excellent...
For the price, this pack of two 140 fans looks great. The colour addressing is present and quite good and the various cables are well made.
The assembly is very simple and for those who do not have an argb connector on the motherboard, a manual converter with eleven light sets is present.
They are PWM so no worries about noise. They are indeed silent and well adjustable but you have to adjust them well otherwise they are noisy at first...
THE + : the quality, the assembly and the silence.
THE CONS: nothing