Lifelong Sainsbury's customer here but over the past 4-5 years or so I've really noticed a dive in the quality and value of their food. These days even their premium Taste the Difference range barely carries any flavour but still seems to attach a whacking great price tag.
Randomly stopped off at my local Morrisons today to grab some snacks and was pleasantly surprised by the quality of their own-brand products. Lots of choice and a longer shelf-life than I've seen in Sainsburys for quite some time. A few big brand treats such as alcohol advertised at 70% of the prices I've seen elsewhere.
Considering switching to do the full weekly shop here now and would love to hear from others with recommendations of any products worth a try (or if there is anything I should be steering clear of!!)
We eat mostly vegetarian on weekdays and keep meat/fish for the weekends.