I've also has my eye on this one for ages. I think it's the biscuit malt that I like the idea of trying/tasting
I think I got onto biscuit (French for twice cooked, or in this sense, twice slightly toasted) because, guess what, it was on offer, at HBC or which ever.
I can't honestly tell you the flavour, body, mouth "feel" or anything else it adds to a brew. Where it sits alongside an amber or brown malt and how it makes a real difference, I can't say on the basis of my experience. They all seem to do much the same job.
If the colour of your beer is important, perhaps that is it?