Extremely hard to turn off
583684
I really like this vacuum for our hot tub and above ground pool. It does the job! However it is really hard to turn it off! So hard sometimes I feel like giving up! This is a huge downside because it makes me nervous to use it knowing how hard it is to turn off. My husband doesn't have as much trouble as me so I usually wait until he is home.
4106424
This thing has loud voice prompts announcing every action it is going to do. And it cannot be turned off as you can see from one of the replies by manufacturer in the Q&A section. So if you forget to turn off that damn thing, then in the middle of the night it will shout "The battery is low". Do you like strange voices suddenly coming of out dark empty rooms? If yes, then this thing is right for you.
This is of course the result of poor design, where they want to put 100 options in just 3 buttons. I hate this kind of minimalism. And also the sound is really cheap.
2657683
It turns itself off every 5 minutes. It looks great and and works very nice while its on. You have to press a key to wake it up. It is really annoying.
874739
Tight fit...but has a covering over the power on switch(soft rubber) makes it virtually impossible to turn power on/off. Would not buy again.
4815651
Pressing the power button requires a lot of force. Really difficult to use.
123065
I can't stand this calculator....the turning off thing is amazingly annoying.  Going to replace it as soon as I can!
3262517
We've tried in earnest to locate the down volume while wearing the phones but find it impossible to isolate it from the other buttons. We're pretty tech savvy, my husband having worked as a TV engineer for twenty-five years and I being an IT Specialist. It's a real hassle to remove the phones turn on a light and look for the button every single time we need to turn the audio down, which happens frequently given our many sources of media. Our other issue is that the transmitter powers off when the phones are turned off, which must be done to conserve the battery charge. This means you must go to the transmitter before each use and turn it on, another drag. The positives are a comfortable, isolating feel, but the isolation has also proved an issue when we want to make a comment while watching. We hadn't considered this so I mention it here.

We wish we'd found these problems in reviews before we bought these. Sennheiser tech support refuses to acknowledge any design issues at all. We regret paying nearly $400 for a system far less usable than the one we replaced.
1075561
There is no way to turn the lights off without unplugging them. That is disappointing, as it is a hassle.
4970887
Good product but a pain to turn off. Installed easy but maybe thy should revamp the switch to make it easer to work
2454639
It's super bright and attaches easily, but it is a major pita to shut off!  You have to cycle through the lighting options so many times to get this damned thing to shut off.  It's borderline ridiculous! You should be able to simply hold the button down for 2 or 3 seconds, but all that does is change the lighting level or the flashing, etc.

If they fixed that issue, I'd buy more in a heartbeat.
2513991
Works well bu the on off button is way too hard to press.
4201247
Great sound, we use the USB port often and it works great, but as we use it to play music in the room at night I wish there was a way to turn off the lighted display.  Instead we have to tape a bunch of thick paper in front and put a large blocker in front of it to block the bright light of the display.

If that could have been turned off someway I would have given this another star :(
769333
Once you pull out the plastic tab to turn them on, they do not turn off.. Every noise sets them off...
3345263
Do I really need to do this?  These pop-us are so annoying. I want to turn them off.  Any advice?
4019625
Not only is it quick to turn off (60 sec), but you have to hit the tiny power button before the toy will turn on again. Too hard for my little one to play with by herself.
4774360
flashing that gives you a headache and you can't turn off - would be better if they just stayed on.
4214119
fur is soft and curled position is cute, especially when set into bed.  HOWEVER, body is not at all cuddly but rather hard, feels  like cardboard under the fur and worst part is that the breathing/purr sound cannot be turned off without taking out the battery.  Really needs an on/off switch.  I could not give it away to my grandchildren.  Their parents did not want the irritating sound on constantly and did not want their children fussing with removing batteries.  I tried setting it into crib at nap time and child did not love it because it's not soft to cuddle.