I've been testing out a set of the new Worth bass ukulele string sets, specially imported from China, and I have to say that I am actually pretty impressed. I like them!
Initially, when compared to the Aquila sets they do feel more rubbery - softer under the fingers which is not a sensation I particularly enjoy as they remind me of the Pahoe strings as fitted to Kalas. However, there is more stability in the poly material used and the strings are far more resistant to rolling under the finger than the Road Toad strings.
The strings come in bright red/orange which I also like (they go very well with my old Afan). Lets face it, if you are playing a bass ukulele in public, you are already inviting curiosity! I have had Aquila Thunder Reds on the Afan for a while (not my favorite stringset - inferior to the standard Thunderguts) because I didn't want to waste a set of strings, plus I wanted to see how long they would remain playable. The problem with the Reds is that they dent easily - fret impressions quickly become apparent. Although this doesn't overly effect he sound on the Reds, it does give you a sense of impending snappage (an issue that has been a problem on the Reds).
The Worths, despite regular playing for the past 2 months show no sign of fret marking at all! I think it because of the softer material used. There are no signs of thinning or stretching out over the nut either. They do inspire more confidence.
As to the sound - well there is a difference to the Aquilas. The volume is down noticeably - my Afan is now no louder than a standard Ubass acoustically (as you may know, the BF basses are usually double the volume you can expect from a Kala). Plugged in of course, this is not an issue. They have a slightly more muted sound - there is less sustain and attack but with that comes a character which I can only describe as more 'thumpy' or 'mature'. It is as though the EQ settings have been positioned so that the highs are cancelled out completely and the lower-mids have been pumped up to maximum. Like I said, I like this sound. It goes very well with the ukuleles, and accordions and other acoustic instruments I often find myself playing alongside.
As to the cost. At present, they are a fair wodge more expensive to add to the BFB range. However, I do expect to offer them as options on builds when I can negotiated a better discount from Worth. Fingers crossed!