Owner of the mi series, after a friend's suggestion, I chose these specific ones.
More volume than the previous ones.
Better microphone... They hear me better and louder (let's not forget we're talking about earbuds).
Better battery life, I think it exceeds 5 hours for each earbud.
A bit bulkier than the previous ones.
A slightly worse fit than the previous ones, but I haven't tried changing the ear tips.

Yes, okay, I'm writing after 4 years. But I think that for the product and the price I got them for, they are perfect. I'm not saying they are the best on the market or that they have the best microphone or sound, but they still work the same even though they've fallen so many times and after such a long time of use, they deserve 5 stars. They are very honest! And I am satisfied!!

Very mediocre sound quality. When I speak on the phone, I disconnect from the headphones because the person I'm talking to can't hear me. If you just want to listen to music while walking, they are fine, but otherwise I would not recommend them.

I have had them for 2 years now. It depends on each person's ear. They fit well for me, but because I use them more at the gym, they start to fall off after a while due to sweat, of course. They are great to wear on the go! The battery lasts a long time, I forget to charge them.

Very good construction, very durable, very good sound quality, and good connection with iOS. I don't use them much for talking, but when I did use them, I had no issues with being heard.

The quality-price ratio is very good! The battery has a long duration to the point where I forget when I last charged them (with normal use), they have a decent sound quality, and I haven't encountered any issues during calls, even in windy conditions. Occasionally, they may fall out during running, but that is understandable. For their price, they are definitely a very reliable choice.

Just like the edifier x5, they do NOT stay in the ears for even 10 seconds, they fall out on their own when you speak, even if you are still. I wasted 29€

Only two problems:
1) they do not prevent other Bluetooth signals from interfering
2) they disconnect (reconnect almost automatically) when I talk on the phone
UPDATE 03/01/2023
Almost three years later, after using them quite a bit in the past year and after some falls, they presented the following problems: 1) inability to charge, resulting in running out of battery unexpectedly, as I thought they were fully charged, and 2) the right one now only plays at 10% volume.
Overall problems I noticed from using them: 1) poor isolation from external noise, as well as 2) low volume. 3) The fit in the ear is also very mediocre. Some Philips earphones from a decade ago, costing 20 euros, were comparatively superior in all three aspects.

For the price and usage I do, it's perfect. I've had them for half a year and they haven't suffered anything. They have fallen down several times and still work fine. And for those who say they don't connect to devices, they are probably doing something wrong. I have connected them to other friends' mobile phones and laptops, and they connect just fine

Well, summer with heat.. They fall off and disconnect on their own, my friend who bought the same ones also experienced this, useless when it's hot, simply.
The rest..
Decent sound, they block out some external noise but don't expect too much.
From the microphone, there is A LOT of surrounding noise, so you can't speak comfortably if there is noise, wind, etc.
They slip out of the ear, requiring adjustment, and if you accidentally touch them, which you will, you accidentally pause the other one.
As for the battery, personally, I find it fine.

Go for something better, especially if speech matters to you

I have bought them for about 20 euros. They connect very easily with mobile, computer, and smart TV. It works even when only one is used. The sound is quite good, but not very loud. The microphone sounds clear, but it doesn't isolate the surrounding sounds. The battery is quite good.
On the negative side, they slip a lot, both the headphones and the case. Also, they don't fit well in my ears. Sometimes they stay in place, and other times they fall out for no reason.
For the money I paid, I believe they are very good.

Do not buy them, they are completely useless. I have tried to connect them to 3 different computers (Windows 10) and 2 different phones (Xiaomi A2 Lite, Motorola G8). They don't even connect to Windows, while on mobile phones the sound cuts off at unacceptable points. Absolute garbage.

I bought them to replace something old that I had, one of which made contact, the other not.

Let me start by saying that their connectivity is immediate, meaning as soon as you take them out of the case and put them in your ears, they are connected. The sound with the pre-installed buds is very good and has a nice bass, but they slip very easily from your ears.

The touch commands are decent (personally, I'm not thrilled with them, but they do their job), but we have a serious disadvantage regarding this: you can't adjust the sound from the headphones, nor can you change the song (previous-next).

Yes, you read it right. You have to do it from your mobile phone, which is a bit annoying to me. And another thing is that the sound is not very loud. Meaning, if there is noise, you will have to turn the volume all the way up just to hear.

For me, it is of mediocre quality because if it doesn't provide the basics (which even €15 wireless headphones do), it's not worth it

If you have money to throw away, buy them. They slip too much and they constantly fall from your hands, they fit well in the ear but after a while they slip off and come out on their own, and also you can't use just one of the two.

+ I have acquired many earpads of this type. I purchased this particular one for around 22 euros and it truly left me extremely satisfied in all aspects. Sound quality, relative comfort, beautiful design. If I have to mention something negative about it, it would be the relatively average battery life (it doesn't exceed 4 hours for me). Overall, this specific company manufactures quality earphones, earpads, etc. at relatively budget prices.
+ The downside is that they don't change songs and you have to do it from your mobile - also, in order to turn them off, you have to put them in their case - they don't have an on/off switch