I give Taco's a 5. The app has some flaws.
I have the impression that the app is still in beta (there's a note about it in the app itself).

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Pros:
- The promised features are there!
- The product map!
- Great customer service
- The app used to be slow, but now it's fast!

Cons:
- Some keywords get stuck when added across accounts. They can't reach 100%.