Yes and no, there's one issue that has already been fixed in the app, but the development version is only on apple and I had my Xperia with me. Apart from that it worked really well, allowed me to control my plain vanilla dcc locos as well as the HM7000 equipped pug.
As a result of my testing there are a couple of app improvements that have been suggested too.
No firm date on the release of the dongle yet though. Not much longer so we have been told