Rocky's space was just as expected - a clean, compact, no-frills place to sleep, in an excellent location. I highly recommend it and would love to stay there again if the need arises.
Everything was clean, comfy, and functional. Although the outside temperature was near freezing one night, and the basement floor was a little chilly, the air in the room was comfortable, and there were rugs on the floor to keep your feet warm. The bed was comfy and had plenty of blankets. The bed frame was a little squeaky due to slightly loose bolts - didn't bother me as a single traveler, but might be a little annoying for a couple.
The room was surprisingly quiet for being right on a busy street. I still did use earplugs to block out the hum of the mini-fridge and the occasional car horn from outside (plus you can hear creaky footsteps overhead if there is someone walking in the main house over you), but I think you could get by fine without earplugs.
Only other minor things to be aware of: (1) the ceiling is pretty low. I'm 6'2" and standing on the rug in the center of the room, I couldn't stand up straight or I'd hit my head on the ceiling. On the edges of the room, where there is no rug and the ceiling is a couple inches higher, I was able to stand up all the way with no issues.
(2) There was a faint sewer gas smell that I noticed here and there; I think it just comes with the territory of sleeping in a converted basement space (probably some drain pipe seals that are letting a little gas escape). I'm a civil engineer and deal with sewers on a regular basis, so I'm certain that's what I was smelling. However, it was so faint that it didn't bother me and I certainly don't think it represents an unhygienic or unsafe condition. Just something to be aware of.
Like I said, overall I really enjoyed my stay!