Both egg mcmuffins yesterday had bad eggs. The colour and texture around the yolk part was grey/blue and the Grey part was bad texture. The egg white had a weird look and feel.
But the French fries were hot and fresh, for like the first time in years, so was happy about that.
And of course, no receipt provided to provide feedback. For me, there's an extremely high correlation to a properly made order that gives the receipt and bad food/wrong order gets no receipt. Very high correlation.