I shop at my local cheek-by-jowl Coles and Woolies once a week when I am in the Town Centre anyway for other commitments (although I travel mostly by bus, so I am cheating a little in suggesting I have the car with me anyway – and by the way, I sometimes make my own ethanol on waste sugar to run my ageing Subaru on E85).
Specials change on a Wednesday, when my loyalty card emails me a printable list of all the things on special that week that I have bought reasonably frequently in the past.
I have tried both Coles and Woolies home delivery, and have been disappointed with both.
Firstly there’s their disappointing choice of relatively-poor-quality fruit and vegetables (including their weird substitutions when what I want is out of stock).
Secondly, they bag the soft fruit in with the hard stuff, so that it arrives even more bruised than I imagine it was when they picked it in the first place. Not only do I pick the eyes out of the fruit and veg on offer, even when shopping at farmers’ markets, I have fruit trays with multiple shock-absorbing linings in the back of my station wagon to get all my fragile purchases, whether fresh fruit or packaged snacks etc, home in perfect condition.
Thirdly, there’s their equally-weird choice of substitutions for regular groceries when they are out of stock, including substituting full-price items for O/S specials (and charging the full price), or substituting house brands whose full price is the same as the Brand Name on special – perhaps because they read Choice which regularly insists such usually-poor-quality house-brand products are the equal of Name Brands! 
That said, I must give credit to Woolies for once substituting a bulk refill for a complete container, without charging any more than the complete container whose price on special was about two-thirds that of the bulk refill (which was not on special). Indeed, I tried to swap the bulk refill for the complete container I had paid for in the home delivery when I was next in my local Woolies (while thanking the store manager for his grocery chain’s generosity) but he just looked at me like I had come from Mars.
Fourthly, I thought their home delivery trucks would be equipped with refrigeration for perishables, but not so – and again, I have a car fridge into which I put my own refrigerables/frozens, which I have picked in the supermarket straight into doubled-up insulated bags with freezer bricks I bring from home, and I am usually home sooner than the same order coming by home delivery.
Given the condensation on the defrosting frozens and the warming-up refrigerables in the heavy-plastic bags used for both chains’ home delivery, I wonder what they will do when they start using the starch-based compostable bags which weaken (or even melt) in the presence of that much moisture? Mind you, some of the boxes that came in the home delivery looked like they had indeed been dropped from waist height through the bottom of a decomposing starch-based bag and then picked up and put into one of the fit-for-purpose plastic ones! 
Fifthly, I wouldn’t dare order a hot roast chicken for home delivery (or roast lamb or roast pork or any of the other hot goodies on offer from Coles and Woolies) – they would certainly not pack it in doubled-up insulated bags (as I do) to both keep it warm and to keep its heat from damaging any perishables in the vicinity.
Sixthly, by the time I have checked off the invoice, which is in the kind of tiny type only teenagers and twentysomethings can read without reading glasses, it has taken me almost as long as doing my own shopping! 