Picked mine up on Christmas Eve. Very very easy to connect and use. I have an android Samsung Note 4 and a newer version TIU so the USB connection was as easy as it gets. After upgrading the TIU and DCS remote to 5.0, again super easy to do, I connected the WiFi system and opened the app. I like the ease and quickness of controlling the screens and trains. When adding engines to the App, I had several DCS 2.0 and 3.0 engines on the track all at once and it found them all and allowed me to add each individually. Control was super easy and accurate. I'm sure there will be a few bugs, but it will be nice and easy to update and fix. Plus you can still use your existing remote should you need to. And at this point I need to as the Wifi App upgrade version does not have the Lash-up feature yet. As I was told, 2016 for the Premium addition with added features like switches, accessories, Lash-ups, etc. All in all pretty happy with it. I can only see it getting better.
The future of Model Railroading is here!
Have fun,
Marc