The audio APIs themselves are mostly OK. As always, the big problem on Android is fragmentation. I tested on as many devices I could get access to, but have discovered since launch that there are crippling performance problems on the Nexus 5 and a few other modern, popular devices. I've had to block downloads to those device and am scrambling to work out what the problem is. I've never developed for iOS, but I am extremely envious of the homogeneous hardware platform.
Out of curiosity, how is working with the audio APIs on Android?