Share 'Favorite machines??'

I have heard many ppl are loving the pneumatics (neuma) and the rotary(hawk) there is also a few others does anyone have any insight into these new technologies or any good reasons they love their old doorbells??? And if so whats best for who in your mind??? General machine chatter...if a new machine were to be invented what features would u like to see in it??(i for one want no clipcord!!)