Mixero is certainly not a phishing site, it is quite proven and there are no complaints about it. By the way, they recently implemented a new method, they named a ricochet, which in some further analyses is closer to coinjoin than to the classic mixer.
Ricochet has nothing to do with coinjoin. It is just a copy or Samourai Wallet’s ricochet feature which adds several hops to your transactions. Why you would send your coins to a custodian and pay them a fee for something that can easily be done from any regular self custodial wallet is beyond my understanding. It is worse than coinjoin because it doesn’t hide the connection between the sender and receiver and all the extra hops cost you unnecessary fees.
They also have terms and conditions prohibiting residents of the United States so I assume all the people that complained about zkSNACKs censorship when they had similar geographical restrictions in their final month of operation will be just as angry and will be pressuring forum users not to use Mixero. They should be doing that regardless because it is a blatant scam. You don’t need a custodian to swap back and forth between BTC and XMR. You don’t need a custodian to do coinjoins for you. You don’t need a custodian to add hops to your transactions. They are deceiving customers by claiming to offer privacy services when they are really just a custodial wallet trying to scam you into paying fees.