One star since after 3 months and minimal charges due to not so frequent use, the case stopped charging

The headphones are connected to the device even if they are inside their case. The reason is that they do not fit well in the case and therefore discharge quickly if you forget them overnight, for example.
Another reason why I give a low rating is that your interlocutor literally hears everything from the surroundings. It does not isolate the speaker's voice at all.
Otherwise, they are not affected by sweat and water (running in the rain) and their sound quality in music is amazing.

Very good for their price. In the span of 5 months, one earbud had detached, rendering it useless.

I have them for about a week and they are simply perfect. They are very discreet. The sound is very good even when watching movies. I haven't heard any complaints from my callers regarding the sound and I can hear them well too. If I want, I can use only one while the other remains in its case and is ready and charged. When applied correctly, there is no fear of them falling out of the ear.