Review on 🎧 Enhanced Audio Quality with Plantronics Vista M22 Audio Processor by David Thornton

I originally gave it 5 stars but had to downgrade to 3 stars due to sound quality issues. In the middle of a call, between 10 and 30 minutes, the volume would either suddenly drop or inexplicably increase, along with mic feedback and lots of hiss and crackles. It actually sounded worse than the block I replaced. It might have been the worst of them all, but for $70 it certainly wasn't worth risking another. In 40 years of using Plantronics products, this is the first mistake.