The problem you’re going to have, especially with substitute items is that the staff don’t really have the time to be picky with what they’re picking. Often the gun will select something that’s in a different location, which means they’ve got to trek elsewhere to get it…or they can keep to their times, select something else entirely and move on with their pick; especially in the run up to Christmas where there’s a massive influx of untrained staff who frankly, couldn’t give a shit.
Obviously there’s going to be a bit of shift from store to store, company to company, but I think there’s a general view that if the customer is that put out by the subs, they’ll just come and get their shopping in store next time, or they won’t and another customer will fill the slot.
It’s bad for customers and bad for colleagues, but the bosses just don’t give a crap. £££ go up.
Anyway. Forgive my moan. I don’t really have anything meaningful to add to this. Maybe give Ocado a look? They tend to be a bit pricier but I imagine, given the nature of their business that getting it right on the doorstep is the be all and end.
*I worked in a Sainsbury’s supermarket for fifteen years.