And if I may, a fourth benefit of using phenomena:
In some cases, part of your aim may be to teach the client to be less conscious in certain situations - for example, when socialising. True comfort when socialising comes when you lose self consciousness and become absorbed in the interchange.
Having a client do something unconsciously can be a valuable lesson in just sitting back and 'letting it happen'.
I would say though, that if you client has any paranoid tendencies, it may not be a good idea, it may be interpreted as you controlling them!