How does everyone not have this? 90% of Spotify's ads are just them telling you to buy Premium. Like having someone come up to you and saying "Hey, I'll stop bothering you if you give me $5" over and over again until you give them $5. Consider this the bear mace of the internet.

works great and amazing

It just works!
Read the description carefully if you have some problems with this extension.

Work fine. Thanks.

i can finely listen my music in peace without adds appearing each second!

Excelente

Just doesn't work, ads keep playing.

Works as intended! It doesn't block them, just mutes the tab while they're playing; you hear silence for the duration of the ad. Spotify detects ads are still being played, so your account is not in danger. Hopefully Spotify doesn't have the ability to detect sound at tab level.

Edit: I wasn't sure what "requires calibration" meant but looks like I have to click on "restore default" every time the web player is opened. Very minor inconvenience which I don't mind.

It works if at Options > Ad Title you fill it with how "advertisement" is said in the Spotify's language you chose, browser version (URL: https://open.spotify.com)
Keep on, how peaceful now! :)

I have been using this extension for a couple a hours and it seems to be working well, without any drawbacks. Thanks !