It is very variable (reviews of PIA by 3rd party neutrals)...somewhat consistent theme seems to be the crew/staff are quite top notch but the aircraft/systems/procedures themselves need updating/improvement etc.
So its not all a somber story of bad quality etc (though on high loading routes like in OP, likely there is less chance for the crew to shine through for individual experiences to make up for the lack in other depts).
Here is (recent) one that is quite positive towards the PIA experience (and def with that friendly and attentive flight attendant, it makes all the difference....given that is what prompted his very bad review some months back of malaysian airlines) :
@American Pakistani @Dubious @WAJsal @waz @DESERT FIGHTER @MUSTAKSHAF @Game.Invade @Major Sam