Never having received the sacrement of confession from Padre Pio, I can’t comment.
Remember that he had spiritual gifts not given to many, and of course, as his sanctity became known people may have interpreted things he said differently than they would have if their own priest said it.
Best advice is to find a good examine, prepare yourself well for confession, and then heed the advice of your priest. Do not go out looking for an “experience” every time you go to confession.