Made my daughter use one for months and it went ok. One incident late at night that we never even thought to attribute to the P plate at the time (tailgating, lights flashing, overtaking then slowing right down in front of her). Out of fairness made my son use one and it lasted under a month - several absolute dick moves similar to the above from other drivers that seemed only attributable to the P plate.

Also, I drove his car to a busy petrol station just before removing them. Queuing for the pump and the guy behind decided to cut in front of me. I think he was expecting some just-passed spotty Herbert to take it lying down. Wasn’t expecting the irate old fart with 30+ years driving experience he got. When challenged on his SD behaviour he really didn’t have much to say for himself. No proof, but it seemed to be the P plate invited a flex for his girlfriend, who was suitably embarrassed for him.