I like that we can see everything in real time so there are no surprises when it comes down day-to-day operations or budgeting of our ad spendings! It also allows us have more control over how much money goes where within each campaign/ad set up which helps keep things organized as well since you don't always get an email letting you know what's been spent from one account vs another etc..
Sometimes this system takes longer than usual but overall not too bad. We've used Rexrtb before at my previous job (and still do) because they're very easy going people who understand your business needs first hand if any questions arise during setup process! There isn’t anything i dislike about their product other then maybe some minor issues here & there just be patient while getting familiarized wth them through trial.