Let me share my experience too:
Sound quality is very good for teams meetings, and you can hear the bass, great music all fine until...... you speak into the microphone. When you are listening to music and suddenly open the microphone to speak, the music quality goes downhill. It's like listening from a broken radio. Unfortunately, this is how Bluetooth wireless headphones are supposed to work. The Bluetooth standard has 2 audio encoders, a high-speed bit audio encoder for music and a low-speed bit audio encoder for phone calls. To use the microphone, you must use the low bit rate audio encoder, so the music quality goes down. If you don't want to have such issues, you will go for wireless headphones that use a 2.4 GHz USB dongle and do not use Bluetooth. But okay, I got them for work (even if they cost 120 euros) so I shouldn't have high expectations, right?
But we're not done here, the headphones have a big issue with disconnections as they are not recognized by their application (connected to PC). Sometimes they required a factory reset and now they haven't managed to reconnect at all. I have tried both desktop apps, either Plantronics or PolyLens (HP's after acquiring Plantronics). Of course, the latest firmware. I wonder about the excellent reviews, the headphones are problematic, anyone who looks into online forums will understand that the Bible is small compared to their troubleshooting guides. These headphones in the year 2024 are a joke. Stay away

They are worth their money, good sound quality and sturdy construction. I have had them for almost 3 years and during the quarantine, I have used them for many hours of conference calls. Although they are not over the ear, they have very good sound isolation. So good that sometimes I activate the feature to bring external sound through the microphone to keep an ear on my children :)
Mute, volume, answer call, all ergonomic. After 5 hours, they will tire you (like everyone who has been bothering you for 5 hours), but I think it is unfair to call them uncomfortable. They are convenient.
They can be simultaneously connected to 2 devices, one with the USB dongle and one via Bluetooth. For music, I feel that the sound through Bluetooth is better. The base has a design and provides a place to rest them. It is not necessary and does not offer anything else. If there is a version without the base, as a friend mentioned, you can easily save a few euros.

Truly amazing headset!

Attention to stores, there are 2 price ranges. The cheap price does not include the base. However, the charging cable is included in every case.