A part of the review has been auto-translated.
The filter works as advertised and has good filtering characteristics. With the typical ripple produced by a LM2596 @350Khz the output is stable at 18.4mV Peak to Peak. If the amplitude of the noise is increased, even to 2V, the filtering is very good, presenting a constant 16-18mV output ripple. Same happens with higher frequency values. For extreme cases of low frequency (<1khz) and high amplitude (1V) the filter works up to ~1khz, and the it progressively degrades its performance. At ~800Hz filtering is minimal. However, this is the expected behaviour of these filters. In the pic attached: CH1 is the input signal and CH2 is the output after the filter. Ripple was set at ~350Khz, 148mV (10% of a 4S battery)
going to be using on FPV camera and VTX for my LT-210 quad nice build quality