I like that we can see all of our posts at once! It's also easy enought if you have any questions or need help with anything else regarding your account/posting process - there are always people who will be able answer those sorts of things quickly as well!! Sometimes when posting something from my phone i don't get an "updated" notification until after hours later so having this feature would definitely make me feel better about not missing out by waiting too late :).
We use In What language primarily because its been around since before Facebook itself was released which means they've had loads more time than us but still offer great support & features compared to other providers such as Buffer etc. The fact that their customer service team respond pretty much immediately makes using them one less thing hanging over each others' heads while working together online :).