SUPERLINER UPPER BUNK:
When we got married in 1981, I took the upper bunk on a Superliner honeymoon trip. It was tight but I made it okay. At the time I was skinny as a rail. :giggle:Along came kids and they always got the upper berth. Then a few years ago when my daughter was a teenager she complained about being bothered and having trouble sleeping with the ceiling being so close. I didn't quite understand that until a couple of years ago, when for the first time in many years my wife and I took a solo trip (in a Superliner bedroom). I'm not obese but am bigger than I used to be, and I had to crawl sideways to get in and out, and couldn't sit up. It did feel like being in a coffin. :mellow: Now we will do this: either get two adjoining bedrooms (quite pricey), two roomettes across from each other, or one bedroom and one roomette. The extra space is good to have, especially if you tend to be claustrophobic.
I checked Amtrak's website and they show other dimensions but not the vertical dimension. If you have an artificial knee, or are even a bit claustrophobic, I would advise against the upper bunk.
I use Amtrak to get from one point to another, but also for enjoyable travel. The upper berth is not enjoyable for me anymore; the lower still is. On the other hand, the old fashioned bedroom in a slngle level sleeper had plenty of headroom.