Positive:
Very efficient delivery with respect to timing, drivers, normally no need for substitutes, etc.
Quality of food usually excellent.
Occasional problems:
Meat can sometimes cause problems because size of joints (too big or too small). Butchers' fresh packs can sometimes vary so much in size.
More recently, packing - especially of cakes and tarts has caused problems. When cakes and tarts are pushed in bags on their sides, they collapse and break up. Sometimes the packer puts heavy or sharp things like cans on top of a fruit pie, so I stopped buying nice cake and tarts for a while. Last week I bought a lemon tart and it was broken in a number of places and a tub of cream was cracked and leaking.