The best thing about this service was that I could do all of my tasks in one place, from scheduling to sending emails through A/B testing campaigns with our clients! There were some glitches here or there but nothing too serious - it's still worth using as long you're willing put up wih minor issues until they are fixed (or at least acknowledged).
We used their services mostly during holidays when we had no other choice than working remotely which meant less time spent managing content so overall things went pretty well though not perfect either :) They also helped us create more engaging newsletters by adding images / videos etc., making them look much better compared to those created manually without any assistance form external resources like theirs :D.