Last week I received my Pono pro classic AT 5 that has radius board. (see link below) It's very comfortable to play despite people say Pono is like holding a baseball bat. I have small hand yet I have no issue with the neck.
It has a very rich and deep guitar like sound (I use Fremont wound Low G with Southcoast for the rest) . Craftsmanship and the glossy finish are as good as my expensive Hawaii K-Brand. I have absolutely no complain on the quality . It sings beautifully , I just can't put it down. I would sleep with it if I could. Yes the Pono really sings.
The only things I don't like is the weight - it's a lot heavier than my old Kala and super heavy comparing to the Hawaii K-brand. If you are not looking for Tenor size , weight may not be an issue.
One suggestion - buy PONO at Hawaii Music Supply (Theukulelesite). They do great set-up . Shipping is free if you order $400U.S. (assuming you live in the U.S.) I will not buy Pono from any dealer other than HMS. I know you will get the same advice from most of the members on this forum. HMS has the most Pono selection because the owner's father own the Pono factory.
http://www.theukulelesite.com/ukulele-market/pono-at-5-acacia-pro-classic-tenor-w-case.html