Often bluetooth speakers have a high mid range for voice and communication, which can make music not sound as good as it should, luckily the Riva Turbo X has an even mid range that sounds good no matter the music played.
There's a battery button on the back of the device. You have to manually turn it on or off to use and charge. This is due to the battery being used while the power is off on the unit, so the manufacturers have given an option to conserve battery by turning the battery completely off on its own.
Rock as well as music with a lot of bass falls a bit flat on the device as the speaker is not able to handle them well which means it compensates by lowering the volume and clipping certain frequencies.
The Soundlink Mini uses software to make sure there is no distortion on the device meaning that when you go louder the software will quit the music some, which makes for a more even sound, though means that you can not go as loud as some other devices.
The charging port is proprietary, which means you need to carry around the charger in order to charge it (instead of using a standard mico usb which is often used in electronics now). This also means if the cord is lost another will have to be purchased, which will be hard to find and costly.
Due to the single driver there is no stereo sound, this effects the range of bass and treble which makes for a poorer experience than stereo speakers available. It is also attributed to the size of the speakers where most small speakers like this will have trouble with certain ranges.
There is little dynamic range for this device, which means that some music may sound good while others will not. This is often the price to be paid with witless music as well as utilizing little speakers.