I own two Mele ukuleles, a Koa soprano and a Mango concert. The soprano was my first in that size, and I wanted something very traditional and made in Hawaii. The mango concert was a follow-up purchase and is one of my favorites to play. Both were purchased direct from Mele. Sound quality is very good and they have great weight and balance. Honestly, they are pretty to look at too 😉
The reason they are careful (or vague) about where they are made is that much of their wood is prepped and cut by hand in the Philippines, and then the ukes are hand assembled and finished on Maui. Hard to know which woods are from Hawaii and which from the Philippine, but all are hand cut and hand made if they are actual Mele branded. Overall they have a good build quality. Not as good as a K brand (my newest soprano by comparison) but hard to beat what you get from Mele for the money. Their set up is done well, and they do take care of you if there is an issue. Hope that helps!