What do you like best?
This software hasn't changed much from an interface perspective in the few years we've been using it (Back since the Teamlab days). Although the interface isn't ideal it is at least consistent. Onlyoffice also utilized nice ajax features and used to be very fast.
What do you dislike?
Very limited tooling. As a web designer it is also very limiting from a creativity perspective. It is not ideal for sharing designs or programming. It'd really be better for more typical office workers.
Recommendations to others considering the product
Fairly reliable software but you have to change your business to work around it's fairly limited task and project structuring. Great for basic task and timing and CRM functionality. We are building our own version of a team management platform that suits us better, but for most companies this is not an option unless they are in software. I'd say that overall Onlyoffice is a good choice for a small business of creatives or a larger business that does simpler, more methodic tasks.
What business problems are you solving with the product? What benefits have you realized?
We've gotten a lot of use out of the time tracking and task management features. We base our payroll loosely on it, so for us to trust it to that degree has to say something. We build software and websites ourselves, so we are actually rolling our own and pulling some of what we like from this software.