As paddyviking said: Confort is reserved for pax. I drive a VIP EC155 and it's lounge-quiet in the back. The (separated) cockpit is a different story: rotors, fans, wind noise, cold (to get decent temperatures in the front you have to boil the pax alive) and hard seats. And don't even dare to turn on the heat, it's like having a third engine running in the cockpit, but only noise-wise)