The auto saving feature is nice, but a lot of people require the device always on. And using a cable to bypass the power saving feature defeats the whole purpose of having a wireless device. Then when it does turn itself off, the power button is annoying. The speaker is powered off, yet you have to put the power button off and then on? This is just plain bad design and annoying.
The mini also suffers from background hissing, just like the Anker square pocket speaker. Granted the hissing is a lot lower on the mini, but it’s still there.