I used it lately and it works well. I use the Windows standalone version from their official website. Last time was a conference call with five people. Downstream dealt with videos of three of them very well with no delay in audio. Not sure about the upstream as I only used audio. I'm shy
First thing as I connected with one who used audio and video, I tested the latency with her and it was perfect.
My whole life I used it two times only. With my fears of screwing up in spoken English, I keep coming with excuses for invitations I get from my online friends