More from my DEMO Europe contributions at Mobile Industry Review:
Although the improved conversation UI is convenient (especially so on mobile) it’s the custom workflow that will appeal. Users can request basic approvals or build more complex multi-step review processes that can be incorporated into a task – including from the mobile apps.
I've yet to try the product for real and the mobile UI is a bit 'basic' (iOS apps really need some design expertise on the team these days) but what does impress is the support for custom workflows through Papirus.Net's mobile apps.
I've used several such tools with colleagues in recent years and none have offered this dual approach of lists customised to me and a mechanism to keep reviews / approvals happening within the tool. Most (BaseCamp, for example) quickly fail into email notification overload.