We were able to self check in and Jason was happy for us to check in an hour earlier. I didn't realise there would be two flights of stairs to get to the apartment because I assumed 1st floor was ground floor (my mistake). Just be prepared to take your suitcase up stairs.
The apartment itself was as described and we had access to plenty of appliances and everything else we needed. It is noisy at night when sleeping in the loungeroom on the sofa bed, which is not surprising for a central location, so I used my (very loud) white noise and was able to sleep. My mum slept in the bedroom and said it was mostly quite all night and slept quite well.
The location was perfect and walking distance to everywhere.
I have no complaints and we loved our stay in Edinburgh and would love to stay at Jason's apartment again in the future 🙂