I never tried taped strings on my J-Bass, that's like a revelation to me! the tone is amazing, sounding kinda like a double bass, you can still get some brightness in the sound, it's not completly muted in the trebles.
The biggest pros to this product is (IMHO) the feeling of the touch with your right hand is so sweeeeeet !
Even if the gauge seems big, the tension is like a drop D, really easy to play and soft.
I'm not gonna say that is the best strings for bass, but if you want to experiment, definetly try these ones one time! You'll be suprised!
(I did a video on YouTube just type "Jazz Bass Black Nylon" I wear a orange t-shirt)