AP John Tee is not my gynae but he performed the CVS procedure on me when I was about 20+ weeks pregnant. Although he seemed like a busy gynae (the waiting time was really looooong), he was professional and confident during the procedure. I was very nervous throughout the procedure and kept very quiet (plus it was very painful when the big needle went through my tummy), I think he sensed my anxiety and tried to crack some jokes to liven up the mood.
From what I've read in this forum, AP John Tee seems like a popular gynae. If you dont't feel completely comfortable with Dr HC Han (saw your other post about this gynae), why dont't you give AP John Tee a try?