I agree. I don't have very heavy growth, but the beard seems really stubborn to get an easy BBS. I don't prefer using the Feather, way too sharp, but does not exactly shave deep, I'm not sure why.. Touch ups required to get the perfect result and there is where the irritattion begins. But I don't chase the BBS all the time.I pretty much shave every day so if a blade's not as sharp as say a Feather's, it's not necessarily a bad thing.
However if you have heavy growth and shave once a week then I imagine something a little sharper may work better for you. If myself I am shaving after a week or so, I prefer a very sharp blade (eg Gillettte 7 Yellow) and a open comb razor, but all of our preferences are different!