I used it as the base malt in an Irish Red I brewed for last St Patrick’s Day and I was really happy with it. Red x is an awesome malt if you let it be the star of the beer and don’t cover it up with a bunch other malts or over hop it. I definitely recommend it for an Irish Red!
I do one with mainly Red X and then I crank up the body with some other malts. I like the slight candy sweetness of Red X, and the color is impressive and consistent. I recommend giving it a try. I am planning on doing a Red IPA with it soon to see how the color and flavor plays with a larger hop presence.