Blueser
I haven't used the full set of taper core burners but I have used (and for quite a long time too) the normal Burners on my1983 P-Bass with P/J's as well as a Ken Smith Chuck Rainey 5 I used to have. The B was tapered on the 5 string bass and in my opinion was an improvement over the regular wrapped B. It seemed to be a good deal clearer and was flexible without being flabby.
I've used them more recently on my Lakland Bob Glaub with P/J's and used them through the body. They sounded great regardless of what instrument they were on and whether they were through the body or typical stringing. Again though .... these were the normal wraps.
The burner tone was fabuluous. I noticed I had to drop a notch volume-wise using a GK800 because they were much louder than the D'Addario XL's I had been using. They also lasted a whole lot longer and did no damage to my frets.
They sounded a bit more midranged than the XL's but that was actually a good thing because they cut better.
I stopped using them after switching to D'Addario slowounds (which they discontinued - major drag! They claim thier XL's sound like the slowounds which in my opinion they are not even close)
The Burners were slightly a bit stiffer than the XL's too.
Over all I think they are a terrific string. I wouldn't mind trying a tapered set myself but right now I am enjoying DR Sunbeams. Who knows ... tastes change as gigs go by .... maybe I will grab a set of tapered burners.
Jim