Bought them on sale when I forgot my QC lurking on the job. The great thing about them is that they are quite ok and freedom with Bluetooth are very nice and easy to connect to various devices.
The negative is the sound, sure they are cheap trick but unfortunately a high-frequency electrical "buzz" that is very tiring that is not acceptable for headphones under me.
The second is a minor detail is that they have a diode that flashes quite strong light when they are used, they are doing anything but relaxing to use them if you (like me) like to listen to music in the dark to relax .
I will probably try to find a good pair of Bluetooth headphones to use at home when I do not need any noise reduction here and they are absolutely wonderful how free you are when you can go around unlike wired as I used to.