I have made many trips between Denver and New York from the late '60's until the late '80's, and my favorite of all accommodations was the Single Slumbercoach room. I loved the price, the privacy, and the private facility, which by the way, you could use late at night without having to raise the bed as you would in a roomette. true, the bed was considerably narrower than the First Class room, but I was very comfortable in it. I would always try to get an "upper level" room, as it seemed more open and less claustrophobic. And the view out was a bit better, and it gave you a little more privacy if you kept your shades up at night to view activities during station stops.
The most common diagram was 24 single, 8 double rooms for an incredible 40 beds in a single level car. There were also a number of 16 single, 10 double room cars. These cars had what I call the 'choice' rooms. At some point in their career, four of the original double rooms had their upper bed removed, and were marketed as singles. So you got the same small bed as the duplex singles, but you had a huge amount of space otherwise, not to mention the much larger window.
The most common diagram was 24 single, 8 double rooms for an incredible 40 beds in a single level car. There were also a number of 16 single, 10 double room cars. These cars had what I call the 'choice' rooms. At some point in their career, four of the original double rooms had their upper bed removed, and were marketed as singles. So you got the same small bed as the duplex singles, but you had a huge amount of space otherwise, not to mention the much larger window.