i disagree here a bit.
At least on my TV it is very fast and easy to use, Android boxes , at least the ones i tried are very slow.
Were i agree with you is currently the features are a bit limited.
The button customization is very high on my wishlist, as is beeing able to launch a webpage in fullscreen from the menu.
Also some apps are missing, but luckily for me, my main apps such as Plex and SIPTV are working fine.