The ease of use! It's super easy to set up your own process flow with this tool -- you don't have much room left if there are too many options available out-of-the box (like we did).
We used it mainly internally but they do offer an API so one could potentially build apps that would connect more directly into other systems like ours or maybe even outside our system as well? Maybe someone has done something similar already though I haven’t seen anything come across my radar thus far from what i've read online about their product offering - just thought id mention here because its been such good value overall especially when considering all features included within pricing tiers offered by them vs others who charge considerably higher fees per month than us!! Internal communication between colleagues using internal messaging via email etc was often lost due timezone differences where sometimes people weren't always checking emails at times which made things difficult without having access 24x7 / 7 days x 365 = 3.