I had made an appointment but was kept waiting 25 minutes as they prioritised walk ins. I found this unacceptable. The treatment itself was fine but there is clearly no point making an appointment or expecting to be seen promptly.
It was super busy and more than one person ended up doing my treatment and it felt at times like I was forgotten. I think they accept a lot of walk ins as well even if they are booked with appts so I wouldn't recommend if you are tight for time