That's really good results, but $45 is a lot of money as well. Not sure if worth if, if Apple can still provide excellent DAC and sufficient amp in terms of output power as well for $7. These dongles are easy to lose, and $45 is very hard to swallow in such a scenario.
But the Apple has compatibility issues on Android phones, of course...
Still excellent of Meizu to release such an excellent product. It's surely a winner if you use it at home on your laptop or desktop PC permanently--performs excellently compared to dedicated DAC/Amps well above its price range and technically takes up no extra space.