Not because the cryptography is clever. It is deliberately ordinary. The difference is in what you get told.
The design here — fixed denominations, Poseidon commitments, a Merkle tree, a Groth16 proof — is well understood and has been picked over for a decade. Originality in this particular place would be a warning sign, not a feature.
Every pool has two anonymity-set figures: how many deposits it holds, and how many the operator does not already own the notes for. The second is smaller and less flattering, and both are shown. A service quoting only the first is describing a pool that hides you from strangers while its operator watches over your shoulder.
No third-party fonts and no CDNs. There is one analytics tag, Google Analytics, and it is worth stating what that costs rather than burying it: Google receives your IP address and the time of your visit, and on a mixer visit times correlate with deposit times. IP anonymisation is switched on, which truncates the address before storage — a reduction, not a fix. Nothing about your note, your amount or your destination is ever sent to it. If that matters to your threat model, use Tor or a VPN. Details here.
A new destination wallet has no SOL and cannot pay its own fee, and funding it from your old wallet rebuilds exactly the link you came to break. So a relayer broadcasts and takes its margin from the withdrawal — and since recipient and fee are bound into the proof, it cannot redirect or overcharge.
The proving key came from a multi-party ceremony where each contributor folds in randomness and publishes a fingerprint. The chain of fingerprints is on the Proof & trust tab with its status stated plainly, including where it is incomplete. An unpublished contribution is the operator's word and is labelled as such rather than counted.
Not "100% anonymous", not "untraceable", not "zero logs". The claim is narrow and testable: deposit and withdrawal cannot be linked on chain, and how much that protects you depends on pool depth and patience.
Compare with Tornado Cash or an exchange.