My stay at JN's place was great, but with a few caveats.
First, the pros. JN himself was lovely, even though his emails to me landed in my spam folders, and I only ended up sending him the signed lease right before checking in, he was patient and kind. The flat also looked like the pictures and its location was great! Just 5 mins from the Pantheon or the metro and surrounded by popular cafes. Self-check-in and out was also incredibly easy with the very detailed instructions JN sent over before we even arrived.
Unfortunately, the cons. Ironically, the location is perhaps too popular. From the description, we expected some noise and prepared accordingly with earplugs, which was fine. However, the smoke from smokers congregating downstairs wafted straight into the flat, making it hard for us to fall asleep and our clothes smell the next day. That being said, this only affected us out on the sofa beds, and those in the bedroom were perfectly fine.