I have had this device for 2 years now. After just a few months, one of the mic channels started to make white noise, which was unbearable. The noise was there even when no cable was connected to the channel. I switched to another channel, hoping this was a one-time thing. But since then, more and more channels started having that problem. Today, I have 8 out of 24 channels which continuously have white noise! It makes this mixer unusable to me at this point, and I have no choice but to buy a different mixer now.
This mixer does have a lot of cool features and it sounds nice, but it's not worth the money since it has a very short lifetime.