Yep; on both Amtrak and Class 1 office car trains.
One memory that stands out was a trip I made on the Texas Eagle and Broadway Limited with my oldest son when he was four. On the Broadway; we had a roomette in a heritage sleeper on the rear end of the car above the truck. There was a flat spot on one of the wheels and I can well remember that thumping all night across Indiana and Ohio as we rolled east.
Flat wheels aside; my biggest issue sleeping on trains has always been my fear that I might โmissโ something. Suffice to say; I tend to doze rather than actually sleep. ๐
Curt