RHS
Dual controls are exactly that but the experience of using a new seat and of using the other hand while concentrating and circling at 1200 feet or so can be hazardous and more so if you use flap.
Of course it all depends on your skill, attitude and experience.
Your mate will probably find it difficult finding his house and also pointing it out to you so that you can keep it in range and in sight.
I would not bother with a PA28 for this task of course but if that is all you have please take care. You cannot afford to get involved with his viewfinder skills whilst flying. Make sure your stall warner is working and that you can recover from spiral descent and incipient spin in case you overdo the bank/speed/AoA etc don't forget Murphy's Law
Hope they turn out OK