I've used it in previous employment. It works. That's the best thing I can really say about it. The interface is shit. The login screen is precariously hard to track down. It slows down your browser, and is a massive memory leak if left running long-term in a tab. It's the same as any hotmail/outlook account in that regard. Can't speak to the admin side. Never had that kind of access. Personally, I have a grandfathered g suite w/ 50 seats from when it was free. never plan on changing it.