After recently finding this thread, I ordered a set of D'Addario J71 tenor 'ukulele strings from Ukulele Underground to try out on my Ohana TK-10. Let me first say that it's not very often you get a personal note hand-written on the packing slip when ordering products online -- you folks at UU are always great to deal with!
My first impressions with the strings was great. They started settling in after less than a full day of being on there -- I also do some stretching of new strings with my fingers and that probably helped speed the process, but they seemed to settle in faster than a new set of Aquila Nylgut strings. I like the tone, sustain and feel of the strings, although I could see where my fingers would need some adjusting to the higher tension. They also seemed to require more nail when picking or strumming to get a clear tone and more volume.
Unfortunately, just about the time the tuning started to settle in, I noticed the neck of my 'ukulele was noticeably bending, so I had to take them off before permanently damaging it.
I hope to have a Kanile'a K1 tenor some day, and might give the J71s another try then -- hopefully it can handle the tension since Aldrine uses them on his without any problems that I'm aware of (maybe it's worth asking him.)
I just thought I'd update this thread in case someone else finds it who's considering these strings -- I found similar posts on Amazon reviews of the strings, in particular others who tried them on an entry-level instrument.
-Alan