I’ve literally just finished my first bag of ‘half caf’ from Rave. You could see which beans were which as the decaf ones were darker and had a slight sheen. I only had them in the Aeropress as an experiment because I wasn’t sure about buying a kilo and I’m trying to reduce my milk (carbs and fat in general actually) as well as reduce my caffeine intake.
I was concerned it was gonna be pants but actually quite quaffable. Maybe next time I’ll buy some decaf and mix it with whatever I would normally have. Thing is I normally go for light - medium naturals and I suspect it would be tricky finding a decaf bean to complement that.