I worked for a company that had a Dassault Falcon 10. I did not find it that comfortable and using the toilet was quite an ordeal. It was in a "closet" between the cock pit and the main cabin. You pulled two pocket doors out to close off the space and the toilet came out of the side like a drawer. It was kind of fun to leave the doors open, leave the lid down and pull it out as a jump seat behind the pilots. I preferred to fly commercial but if the jet was available I had to use it. The novelty wore off real quick. The pilots were on company payroll and just sitting around in the mail room if they were not flying people around.