I followed the recipe almost exactly, except I substituted non-vegan yogurt for the vegan kind because I couldn't find any in my supermarket. That's ok, I wouldn't even come close to calling myself a vegan. Anyway, I ended up winning! The muffins had a beautiful zesty flavour, and when I tasted the batter before baking, I could almost feel it sparkling on my tongue.
My favourite part was the sugary poppy-seed topping. It was sort of like icing on a cupcake (but healthier of course because it's a muffin). I think next time I might try it with orange flavouring instead of lemon... that'd be nice.