I went a few years ago with Ma...it was a train trip......It nearly killed me getting Ma up to Princes Street from Waverly station......I needed two paramedics and oxygen by the time I got to the top....going down was easier and a lot more fun. I think they heard Ma's screams in the cairngorms.
The cobbles aren't kind either when you are pushing a wheel chair. I nearly unseated Ma a couple of times...she was not impressed!