I love my Kala Mango tenor!
I am just a newbie here, and I have had my first ukulele only 5 days so far, but I love it. Even with the cheap GHS strings that come standard on it. I am waiting for my Clear Worths to be delivered. It plays well, and I am very satisfied. I got the "John King" Classical Ukulele book and started plucking out a few tunes already. Strumming is working out fine too.
Anyway, since I already have a classical guitar and a banjo, I wanted something that looked different and dramatic. Koa was too expensive for me at this stage of my skill, and mahogany, though beautiful, looked too dark (for me anyway) for such a happy sounding instrument. I liked the spruce/ cedar tops... a lot of nice choices there, but they look too much like my guitar. So I like the Mango, since you can get that dramatic looking grain. There is such variation in the color of the grains, that you should see it before buying. Some color schemes might be more pleasing to you than others.
Lori