The feedback cancelling the was the major gripe last time I ran a server. Otherwise very functional software.
People with a speakers setup sound awful on all software. Some kind of headphones or earbuds cost less than 10 quid.
The feedback cancelling wasn't the problem. It's a feature that should scarcely even exist.
The only time it's ever really good is when there is some sort of interactive one to many setup. A hands on demo from a lecturer where for some reason they can't wear some wireless buds.