I've had one of these for over a year - even brought it to Jay's Ukejam By The Bay last year, where people were quite surprised by the sound (the finishing wasn't too great, but it sounds nice.)
To me, the weak point is the strings. Phil Kwack said he uses a Chinese-made string that he feel sounded better than Aquila Nylguts, but I don't know. I'm going to try Aquilas on this instrument.
I have left this uke in my car year round - in excess for 100 degree F in the closed car in the summer, and 15 below zero F this past month. The strings are the only part having a problem with the weather; the uke is sold, and sounds nice.
Between 40 and 85 degrees F, no issues, once it is tuned. The tuners are a touch loose, but I've played several more expensive instruments with worse tuners than these.
I guess the biggest telling point is, in addition to all of my other ukuleles, I have ordered a concert size version of the Aqualele, as well. I like having a uke with me all the time, and these certainly fill that need.
-Kurt