I used it at work, 3+ times a day for about a year. It worked well most of the time, but it had interesting ways to fail when it didn't like the connection quality. the MacOS app sometimes decided to stop connecting to any meeting. It got so bad at times that I had to force quit the app after every single meeting, because it didn't listen to regular closing.
It got so bad we added a bluejeans on fire emoji on slack to announce our problems. That said, I've not used it for a year, so some of those issues might be fixed: Software doesn't sit still.
Have been our work official one for nearly 7 years. Works, and has h.323, sip, phone, webrtc. That said, it's very simple, wit just about minimal features.
Use it. It's "OK." It's integrated with room systems. Use primetime for bigger broadcast-style meetings. However, I've switched to Google Meet for when I set up meetings, in part because it's better integrated with Google Calendar so it's just easier (fewer steps).
I'm not sure one is necessarily better than the other once you're in the call but I prefer Meet for the Calendar integration.
Did not work on ubuntu the last time I tried it, roughly 6 months ago. Same goes for zoom, but different problems (bluejeans segfaults, zoom only starts with sudo but no audio after upgrading lts)
From a usability perspective, it worked decently for me for about a week, then stopped working (dying upon opening) for about a week. Now it seems to work again. This is on the Linux (X11) client.