Well, from the last post:
"Please create a native app for the BB10/Z10! The existing one (port) is a bit sluggish and buggy sometimes. I would use the app more if it was smoother, faster, and less apt to crash/hang."
I would not make a purchase decision based on this ported app.
If your company buys BB10 and allows the usage of these ported apps, it's the only option. But if you get to decide your phone brand, don't count this app as a pro factor for BB 10.