This fact may nearly two months that I use
* His forte> The Sound quality
* His weak point> cells too brittle

I already have a grill cell, I replaced's and now it is the second that starts to make me the miseries (sometimes there rained the sound, then I increase the sound and returns (that does not have a fau-contact))

If you do not you server to the mix it was perfect otherwise the cells will not last long
Apart from that it is very comfortable.