The extension itself works fine, but they have started charging for it.
Initially, it was completely free on both iOS and desktop. After that, they started charging on iOS after three pop-ups were blocked, but said that desktop would remain free.
However, I've just received a message from the extension saying that they will also only allow three blocks per day on desktop.
Consent-O-Matic is completely free, works just as well (or even better) most of the time, and is open source.
The daily messages telling me to pay on iOS were annoying; I won't put up with them on desktop either. It was nice while it lasted, but I'm going to uninstall it.
If you're OK with paying, go for it — it's a fine extension. Otherwise, just install Consent-O-Matic.