[Xiaomi Mi Band 4 Guides, News, & Discussion] Lada333:
I was actually thinking of making a video comparing the Band 2 and 4, whether or not it's worth upgrading, I was pleasantly surprised by your thread :D

I had bought my MB2 back in October 2016, upgraded to MB4 about 3 weeks ago.

Never used, let alone heard of "Notify & Fitness," will definitely check it out later.

I agree with most of what you wrote, but I'll also give some of my insight.

- I didn't really notice the MB4 being that much bigger than the MB2, I'd compare the two bands' body-to-display ratio as picking up an "old" phone, with a 16:9 display, and a top and bottom chin, vs. a phone with no chins and notches. MB2 only had an "invisible display" in my opinion, because there was a larger air gap between the display and the top of the glass.

I'm super happy they went with an OLED display, despite the price - great contrast, and no wasted screen-on time!

- I usually had the Band 2 randomly vibrate when having failed to measure my heart rate in the shower, as the running water did indeed cycle thru the functions, however I've never had that or anything similar happen with the newer band (you could also enable the screen lock on it, however that only reduces the chance of it doing random things).

- I can't see any of the downloaded watch faces on my phone in the Mi Fit app (OP3T, with RR) (the placeholders are there, but they are blank, even when tapping on them, all I can see is their names), I also wish it would be a bit easier to create custom faces, though the band's been only out for like a month or two, I'm sure we'll get some AIO tools later down the road.

- Being able to start, monitor, and stop workouts from the band itself is indeed very convenient and useful (also, hooray for pool swimming finally being added), however I wish the real time (not the length of the workout) would be displayed with a bigger font, it's been real hard for me to see, even on full brightness.

- What's been bugging me is that now, on the MB4, you can 'Lift to Wake' even when DND is turned on, which wasn't a thing on the older one - which I preferred more. I know there's an option to disable the function from set time to another set time, but I wish there was a way to automatically have it turn off and then back on again.

- Being able to adjust brightness is a blessing, though I wish it wasn't hidden so deep within the settings. It would also be nice to be able to change the left and right swipe actions from the home screen - music playback controls have not worked more often than they had, and since I'm outside of China, I'm not able to use AliPay even if I wanted to, so that's just a wasted gesture, basically.

- The 'Weather' panel is nice to have, however it's not very accurate at all, I found myself checking the stock Google weather forecast on my phone - but that's just an 'unreliable' weather provider, which, along with most of the things I mentioned, could be changed via a simple software update.

- Lastly, it's kinda funny how when receiving notifications with special characters or emojis in it, the you just get a missing character - ⍰ - icon, but that's just nitpicking.

I was happy to see the new Mi Band 4's release price being almost exactly the same as the price I paid for my Mi Band 2 a few years ago (about 35 bucks).