The main idea of ETHM is extremely realistic and can be implemented due to the characteristics of Ether since it is planned as a privacy layer to ether.
-Now how it works, according to official data all transactions that use this protocol will go through a contract that will mix all the transactions which will make it impossible to know who is the user who sends the money.
-Compatible with any ethereum wallet.
-Some of the features that will allow using this protocol are still under development.
The main problem with this project is its low liquidity and little information that is released on ETHM, it shows signs of being an abandoned project to use with prudence.