It's everything you could want, but this a lot of asterisks. A lot of things are limited (check other comment), but most importantly, their policies force you to hand over any text you write on their platform. But frankly, I'm not sure if there's anything near a perfect solution. A lot of companies use a big clump of services including both self-hosted and "rented". I hope to one day see a better, more comprehensive solution in line with the future of online work.