So far (about a month) I have been using these speakers on a computer I have setup in our living room, connected to our big screen TV. This system is used everyday, and for several hours most days. I have the speakers, computer, and TV attached to a power strip so that I can turn the power off on the entire system at night. My set of speakers did not come with an on off switch--but about a month earlier, I bought another set of the same speakers for my church. and they had the on off switch. In both cases--so far--I have had no problems turning them off at night. Sound is better than any other set of computer speakers I have purchased in the past, but they are also the most expensive ones I have ever bought. Overall, they make my entertainment system top notch for listening to movies, internet, youtube, music, etc. when compared to all previous computer speakers I have purchased over the years.
When I purchased the speakers, I wanted the Bluetooth feature, and used it quite a bit, until I was able to setup my entertainment computer. After that I plugged them directly into the computer using the mini phono plug. One weird thing that happened when I turned on my laptop--which I had previously connected to the speakers via Bluetooth--the laptop found the speakers and attached. Suddenly--even while the speakers were plugged into the running entertainment computer in the living room--the sound from the movie that was playing on the living room computer stopped. Input for sound was transferred to my laptop, so I had to break (un pair) the Bluetooth connection to my laptop, before the entertainment computer would play the sound again.
One feature I wish the speakers had was a button to turn the Bluetooth on and off, but this is not a very big problem. Just a pain to have to unpair, change the default Bluetooth device, or turn off Bluetooth all together on my laptop.