I was in Moscow in a G-4 many years ago. An Aeroflot crew parked next to us asked to look in our airplane and afterward invited me to look inside theirs. Their plane looked like a brand new Tu-134 or something close to that. I was walking up the steps to the airplane, was about 3 steps from the cabin door when the nasty odor hit me in the face. The interior looked new and clean but stunk to high heaven. The lav smelled like a cess pool. The cockpit was new and clean but looked like something out of the 1950's, hundreds of black and white instruments and dials.

Things may be different now but, good luck.