Never had a problem with parcel force.. i always get a text with a 2 hour delivery timeslot and they have always delivered within that time frame..
use them quite often, Matt the driver is a good lad and should i have to go out for some reason he knows where to leave my parcel... i will get another text saying it's been delivered so i know it will be there when i get home. luckily the main post office is just up the road from me so if i send anything through parcel force then i drop it up there... as Terry says you could be waiting in all day otherwise....about as good as it gets for me....
never use them for sending rods over 1.5m.....way too expensive.. tnt get the pleasure of that, although it's still expensive around £19.00
Regarding Tuffnels i wouldn't touch them with a barge pole, they have a depot about a mile from me, they cant keep, get or even treat what staff they have properly..always advertising.. a mate of mine went driving for them, lasted less than a week,, awful company...