The best strings you can put on a ukulele
I have tried all sorts of ukulele strings and the best, by far, are Aquila. I'm particularly partial to the nylgut and have never once had an issue with the string cutting on the nut or bridge. These simply are the very best available.
ProsSound, clarity, intonation, endurance, feel, tension, etc.
ConsThe only possible con is that they're a little more expensive and maybe a bit of a waste of money if you're putting them on an entry level ukulele. These things belong on a quality instrument and are worth every penny.