Great with a little room for improvement
I really like a lot about the way Quip works over the way other collaborative editors do. Google Docs for example, is much slower overall, becasue of no local client, and has significantly worse accesability features.
Quip is fast, simple and intutive. It also has some great integrations and is really easy for people to get set up with. It also has a great mobile experience and a great web experience.
A few things they could work on:
1. Citations
2. Full or at least more full (equations especially) support of LaTeX
3. Better comment notifications
4. Smarter checklists
All in all, I really like Quip and I hope they keep pushing forward.
Metophile about
Quip