I really like Mike and was thinking of sharing this here too. He specifically makes time to mention that his experience proves nothing due to the fact it's limited by out of stock products and the limit of the supermarkets in his area - which is exactly the kind of insight Jack lacks in her crowing on twitter. But Comparing a dozen supermarkets is a lot more thorough and was really interesting to watch.
His limited budget food challenges - where he also makes specific mention that they are *not* to show that living on a budget is easy, rather that it's quite hard - are also really interesting and creative. The food he manages to come up with for, say £1 for a day or £2 per 2 days, focusing on variety, taste, and adequate portion/nutrition often look really good.
Also, despite making and tasting a lot of vegan food, admits he's just a curious omnivore. No 90% vegan bs. Bit of a tangent, but it quite starkly contrasts many qualities Jack should have but lacks.