My Driver CPC course is being done via Microsoft Teams... seems to have downloaded to my Win8 laptop... will let you know whether it's actually any good in a week or so
It works, but if you're hosted on UK South, that had capacity constraints before this current bout of hysteria started.
Any form of VoIP is desperately sensitive to latency. So do what you can to reduce it - hardwired landline type broadband, cable to router rather than wifi, reduce other traffic etc.
A delay of 50mS will start to introduce audio quality issues, and 100mS cause people to talk over each other. Proper VoIP solutions go to great lengths to ensure minimal latency, but the likes of Skype, Teams, Zoom and the opensource one called something like jitshit look at featureset over quality. Some options allow PSTN dial-in for audio, which can sometimes improve things, or sometimes make it unworkable, YMMV. Probably due to where the actual conference bridge is being hosted, and the loading on the PSTN gateways.
Videowise, it doesn't really matter. Unless screen/slide/whiteboard sharing, and that will be 100% down to the upload bandwidth of the presenter.
I regularly use the following in a business capacity, listed in order of best first (in my experience)
Webex
Goto
Skype for Business (on-prem)
Teams