robbo.....i have never given a ticket so someone i felt was not capable of exercising the privilages of their licence in full but i usually advise them to take things slowly ( not that they should fly alone since taking a pax is usually one of the first things a new PPL wants to do ), but just to be aware that they are now the pilot in command as much as the commercial pilot, and as such responsible for passenger comfort and safety.
its why i often feel there is more responsibility in asscessing the PPL than the CPL who is going on to a lot more training. the PPL is taking his/her loved one/s flying next day with all the responsibility which that imposes.
as whirly says...its a matter of choice. do what you feel comfortable with...and pick a good day both for your self and your pax....enjoy the flight captain..
gear up...