Exhausting PIP phone assessment!

I had a PIP telephone assessment for my son in law today. I am his appointee and I had already told them he was not well enough to attend. Fortunately this was already in the system. I just wanted to know if anyone else’s appointment lasted over an hour and a half and I was absolutely exhausted at the end of it. I’ve done many of these assessments over the years, for the family members to whom I am appointee for, but this has to be the longest most laborious one yet! I’ve had the questions whirling around in my head and I’m hoping I answered everything correctly because honestly some of the questions seem to be trick questions. Not trying to put anyone off but I wanted to make other members aware of how tough it is nowadays. Has it got more difficult or was I just unlucky this time around?