It was a SaaS demo, so we had one person sharing their screen, several participants watching, and a couple dialed in via phone. I was one of the ones watching the presentation. About 10-15 in, a few of us, including myself and the presenter, were booted off the call. Attempts to rejoin were all met with vague error messages about there being some sort of network issue. (None of us were co-located at the time.) I was able to rejoin by phoning in, but the presenter was never able to reconnect on his computer. We eventually abandoned Meet and used WebEx instead.
This has been my only experience with Meet, but first impressions do tend to carry a certain weight. It's entirely possible this was an unfortunate coincidence, and that the service is typically as reliable as other solutions. My limited personal experience with Meet, and previously with Hangouts, does not support this however.