I purchased this BRZ HiFi M3 after it was released.
Its sound quality is similar to the SMSL SA300. The product is also polite and satisfying.
However, there are some problems. Pop noise is generated when the power is turned on/off. The M3 I bought didn't turn on on the second day after I bought it. I bought some BRZHiFi products, but there are many troubles that the power does not turn on.