I had the 2015 model and then upgraded to the 2017 model for the 4k output.
Have to say not to impressed unless there is a problem with the device and that is my guess.
It can be slow to respond and sometimes freezes that i need to reboot. I never had these problems with the older model and they both have all the same apps.
Ill likely return it for another to see if there is any improvement.
Any suggestions in the meantime? Is this common