Got a chance to try Xstream box this week-end. These are the following observations (non-pro review) :-
1. We can unplug the dish cable and still access all the apps. Rain will not hamper your app access.
2. Even if you run out of balance the apps work. If you have Airtel Benefits, can watch xstream online content as well.
3. The whole box works on in-built Xstream app in it. As of now, it is free. Not sure what future/competition will do to this pricing.
4. Since it has Chrome cast built-in, we can cast from mobile to TV with this box.
5. Casting of Xstream mobile app content to TV doesn't work. Restricted access. I can understand on this restriction. Also
www.airtelxstream.in did not work in my TV (opera) browser.
6. Not many apps are there in Google Play Store. For unknown reasons, Google Play Store is very restricted. I was new to this TV play store app. I presumed all Google Play Store apps will work on TV. But these guys did not even give a SEARCH (apps) option. Reality struck me..
7. After setup, initially the remote operations are performance lagging. It takes some time to become normal.
8. Airtel Smart Remote app (to be installed in your mobile phone) works basis Bluetooth connectivity.
9. For strange reasons, Amazon prime forward/ backward doesn't work seamlessly. Hotstar / Netflix works superbly.
10. As told by many people in different forums.. recording option doesn't work.
11. Personally, I liked the interface.. However please do note that visual appearances are subjective.
12. I was not sure abt the surround system effect, because my TV has only a in-built 10 watts speaker
13. Regarding 4K, neither my TV nor my eyes understand 4K content.
14. Tried connecting my mobile phone with USB drive in the box. Both are using the same file system, but the box did not recognize. Since casting was working, I did not spend much time on this one to explore further. Need to check.
15. I am not able to login to a different user ID in YouTube in-built app.
For me, time taken between online request to upgrade and installation was less than 4 hours. Basis my usage, I am ok with this upgrade decision. If you already have a android (smart) TV, you can skip this box.
Disclaimer :- I gain NOTHING from giving this feedback and I do not work in this line of business.