I have recently built an amplifier with bluetooth function using this module (XS3868 Ver 2.0).
It work well.
Audio quality is good, not excellent.
Here are some of my experiences with it:
1. Audio Common (pin 1) is 0.9V, don't connect it directly to system ground.
2. Supply voltage should be between 3.6V and 4.2V as mentioned in its datasheet.
If the voltage is 3.3V, an 800Hz annoying noise will appear.
3. Make yourself an SMT-to-TH adapter to reduce the chance of mis-soldering.