Good, but not great
Actually, the sound does muffle and crack, and the problem is on the TRS jack side. If that happens, you just simply need to rotate the jack a little and the problem will go away. It's because the base of the TRS is made of plastic, so if it's uneven (this is just a design problem) the sound will crack/muffle. If the base is metal (neutrik connectors), it will be really flat.
The best is obviously buying a TRS and 3.5mm connectors and soldering yourself.