Thank you "Just Strings".
Decreased tension and deep bass coupled with phenomenal overtones are the main reason I use them. As a cello and upright bass player, I've become accustomed to a certain feel that allows me to articulate notes DYNAMICALLY. With these strings, it's possible to mute, slide and vibrato with the feel of gut strings, and the bright and deep sound of bronze.
Honestly, if you play a fretless acoustic bass with a piezo pick-up, or with a microphone, there are no better strings. The only consideration would be if you needed more harshness and volume to cut through in a completely acoustic situation. There, the Dean Markley phosphor bronze would be better (they lack the feel but aren't as stiff as the D'Addario but just as loud)
But, again, if you are playing with a pick-up or microphone (I'm looking to add a DPA 4099 to my Hafling set-up) in either a recording or live performance, and you want the feel and sound of a real bass or cello, you will LOVE these strings.
I had to cut the cloth wrapping to get them to clear the nut on my Halfling because it has a floating bridge (hence the windings came right into the groove of the nut) but it wasn't a problem.
One other benefit of these strings... they will sound and feel good about ten times longer than any other string. My record for Dean Markley or D'Addario was two months when the overtones were gone and they were almost hard to tune. With my Tomastic Acousticore strings, they sound perfect for about a year, and acceptable for another year. And I've never had one break, ever.
Again, thanks to Just Strings for keeping these where I can get them. And keeping them at a price I can afford. (My local store buys them from here, and charges me $20 on top of the JS price.)