I've disabled everything notifications and phone-control wise on my MiBand. I exclusively use it for a body telemetry device and I love it.
While I miss my proper watches, I just can't leave the MiBand at home.
I loved the first one (or the 2nd revision of the 1st) that just had vibration and 3 coloured led.
It meant I turned vibration off in my phone, and I set the band to vibrate and flash 3 times white for sms, green for WhatsApp and red for calls. But if any of those were from my wife (who was pregnant at the time) it would vibrate longer and flash for 20 seconds.
It was so simple to feel and glance and get the info I needed - no need to squint and try read. It annoys me in meetings when people think they are being subtle reading a full notification from the apple watch or similar. If it is important just get your phone out it will be quicker to read and reply.
I spend the refund money on a small but fun collection of old soviet mechanical watches. The kinda ubiquitous Vostok Amfibia, a "Big Zero", and a pretty poor fake of the Sturmanski Yuri Gagarin wore.
I get much "more joy" from these - even the fake Yuri watch - than I ever got from a "smart watch".
My usual story about smart watches was that I jumped on the very first Pebble Kickstarter, because I thought it'd be useful while riding a motorcycle to be able to see who's calling/texting my phone when it was vibrating in my pocket, so I could decide whether I wanted to stop and answer it. Turns out, the answer was _always_ "No!". Even if it _was_ someone I'd normally pick up for, I was either gonna arrive at my destination in 10 or 20 mins and would deal with it then, or I was on a trip and wasn't gonna be stopping until the tank was empty - possibly at a place with no reception - and I'd deal with it late that evening or in a few days when I got back to town.