Pros: I actually teach project management at a university. When you first start using Beesbusy, the simplicity of the product tends to mask the power of the product. It has an extremely intuitive (almost too simple) "What, When, Who" style of user interface design. As you start using the product, however, it becomes apparent how well it works even for larger projects or project portfolios. Beesbusy does a stellar job at project/task visualization--better than anything else I've seen. You can filter and sort on virtually anything allowing you to see, at a glance, your workload or your team's workload, or drill down in individual projects. Most everything is "Ganttified" including personal workload calendars. So, for instance, it is easy to see how many things are on your plate over time--allowing you to balance or shuffle tasks. Tasks can also be viewed in a Kanban layout. A couple of other things it does well are time tracking and team communication. I have reviewed (and have subscriptions to) several other project/task management SaaS apps. Beesbusy absolutely outperforms anything else I have tried. They seem to be a well-funded company with a pretty impressive portfolio of clients and they have put quite a bit of thought into the product. So if I had to pick a socially-driven project management app, this would be it.
Cons: It would be nice to have a desktop app but the product is stellar in a browser.