The one period I used grocery delivery quite a while back (I was on crutches and I could easily enough go to a grocery store but it was hard to do a full shopping) my big objection was that they'd be out of enough things or did substitutions I didn't want that it was hard to count on getting everything I needed to make a recipe. This was before meal kits so those weren't available as a substitute.

Not sure about prices but I didn't really have a choice.