Depends on the shape of the face of the person you are lighting and what you want to emphasise.Should I use a reflector or a sceond light for those that do it for when I am doing a portriat shot?
If you're going to be using it a lot then buying a Triflector is money well spent IMO.
I disagree. In the most commonly used configuration - with the side flaps up - they make faces broader than usual - which is ok for men, not often for women - and have horrible catchlights.