SGH O&G clinic waiting time

I decided to choose Dr Dev at SGH and I got an afternoon 3+ pm timeslot. I heard that the waiting time is really long.. anyone can share your experience and the whole journey for the first appt at the clinic? I have another appt in the evening after that and I'm afraid that I won't be able to make it in time. Thank you! Update: surprisingly I didn't have to wait too long for my 3+ appointment and could leave before 5pm that day.