Definitely worth it with it's 6.44" screen. A replacement for lovely Xperia Z Ultra with the same screen aspect ratio.

More worth it if you flash it to other ROM. So you can get the most of its bigger screen.
Like:

• 5 toggles in notification area (4 toggles in default)
• smaller bar notification, can fit more app notification without a need for scroll (default maybe less than 7 that fit the screen)
• Face ID (not available in default)
• Change to smaller than XS text size (default can't even change DPI even from Developer Options)
• Split screen (this i'm not sure if global already have it)

1 day I got the phone already request Xiaomi for unlock code.
3 days later (yesterday) already flashed to Euro ROM.
I've been using the Euro ROM since Mi Mix 2, used for 2 months and really happy with weekly updates.

So conclusion, will keep using this phone until there is new worthy contender with 6.44" screen.

What game? Candy crush?