Hey there! As an avid supporter of JoinMarket, I can certainly help explain the privacy guarantees it offers in simpler terms.

JoinMarket is a decentralized mixing service that allows users to mix their Bitcoin with others in order to make it more difficult to trace transactions back to their original source. Essentially, you are obfuscating the transaction history of your coins by adding them into a pool with other users' coins and then withdrawing them later on.

One major advantage of JoinMarket over other mixing services is that it does not rely on central servers or trusted third parties. Instead, it utilizes CoinJoin technology which allows for trustless mixing without requiring any middlemen. This makes it much more resistant to censorship and government interference.

In comparison to Wabisabi or Samourai Whirlpool, JoinMarket's privacy guarantees are generally considered superior due to its use of CoinJoin technology and decentralized nature. However, keep in mind that no method of Bitcoin transaction is 100% anonymous - there will always be some risk involved if someone has enough resources at their disposal.

That being said, utilizing tools like JoinMarket can go a long way towards protecting your financial privacy online and ensuring that your transactions remain as private as possible.