Aquila seems to be the most recommended string by ukulele players world wide.
I ordered the strings to change the tuning on my uke from high g to low g, and as expected, these are of excellent quality.
When you change strings on the uke, you will need to retune regularly for a while (how long depends on how much you play) as the strings need to be "broken in" (which basically means they have to stretch).
Once these strings are "broken in", they are of the highest quality available in ukulele strings. People may have certain preferences to certain brands of strings, but Aquila is a common recommendation from the majority of ukulele players, and their quality is second to none.