It's easy to use and saves a lot of time. It's definitely a good purchase. Unfortunately, it's leaving AppSumo and I doubt I'll have time to upgrade my plan to tier 4. However, if you have the opportunity, go for tier 4 without hesitation.
It's not magic—it requires some effort on your part—but it simplifies things.
The only thing that would be brilliant is if the interface could be translated into other languages...