I made the five seed bread today but with 200g spelt flour and 300g bakers' flour, otherwise exactly as per the recipe. It worked very well and tasted great. I can't compare it to the EDC version with 500g bakers' flour because I haven't made that.
It's a 'heavy' bread though with all those seeds and very filling to eat.. I generally prefer a lighter loaf so am only likely to make this one occasionally.