Saw Sonya a few months ago. She is in a small space downtown. If you have had a PM before, the experience will be familiar. If not, use the washroom before you arrive. She has online booking, book a 30 min massage with her, then when you arrive tell her you want a PM or reach out via email before hand.
Follow the same routine as you would for a massage, except you will be face up on the table. When she comes in she will instruct you on what to do. She is very gentle and knows exactly what she is doing.
It may be slightly uncomfortable if it is your first time, but the key is to relax and let her work her magic. She will communicate with you during the massage. My experience is that time stands still, 30 mins feels like hours in the very best way. It's a euphoric feeling that will leaving you smiling.