As per reviews ,
Step counting is spot on or similar to hauwei and apple .
Push notifications are good and useful
Good battery life
Xiaomis sleep tracking is not as good as hauwei . But still similar to apply .
Silicone bands ar not as comfortable as hauwei .
Are you talking about the 5 or the 4? I had a 4 and this was true to them as you had to take the whole band off to charge the watch, but with the 5 you don't take the band off anymore and I haven't had an issue with my 5.
Can get non silicon bands too, like proper watch stlye alternatives.
Apparently mi band 5 is more accurate than 6 in certain things.
This guy does some great testing on the accuracy of these fitness devices.
https://youtube.com/c/TheQuantifiedScientist
The silicon bands on these are terrible and wear out and break so easily. On the flipside, you can buy replacements them from aliexpress for like $1 each - so i got 10 of them and used about 5 in a year. Not a bad device and very good for this price!