I have used milking machines for years and milking feels just great using a good milking machine with lots of lube in the teatcups used and a nice comfortable milking vacuum level as milking should be a nice and really pleasant experience ! I own and use several different milking machines .
Milking nipples and balls adds a lot to the milking experience and can really be recommended !
I have an Engineers degree and lots of technical experience and can probably answer most questions concerning milking machines and other technical equipment !