as i employ distortion overdose (all the time), the NG-100 is an essential feature in my lineup. the Beta Aivin brand is often referred to as a lesser entitiy due to its country-of origin & price but quality & performance should not be limited by such understanding. i find the NG-100 useful & effective, nevermind its brand name & price implications.
I have ng100 on my pedalboard too. It can handle my tone rider and hm200 hums and hisses. But on my setup I have it after the wah and before the dirts
. IMHO, Ns2 is quite expensive for such purpose.