@sujambanvfx: My Novatouch does not have LEDS on either the CapsLock or NumLock.
@Polymer: Unfortunately, I have not made audio recordings of my Novatouch. However, I find that the stabilized keys have some stabilizer rattle, and the spacebar has quite a bit of return-stroke "clack". In addition, some of the regular keys (on mine, the 9, F. K, ;, and B keys) have a rattle -- it seems there is more "play" in these keys between the slider and switch mount than in the keys without the rattle.
Bear in mind that until recently my daily driver was an IBM XT. Now that I am making comparisons among various Topre-switch keyboards, I tend to notice any noises that rise above the relatively quiet background.