USO: Ultimate Special Offers

I rewrite the comment again. It is an good app with many functions and reasonable pricing.

1. A big mistake occurred. They help to fix with short-term solution. Due to short term solution, I am not so confident about it.
2. A minor mistake occurred. They fixed it.
3. They fixed another problem not caused by them.
4. Because it took several days to fix all problems, I asked for extending trial period, they extended the trial.
5. Can't fix a minor mistake, but they said it is the limitation of Shopify. (decimal places of discounted price)

Overall, the support team is helpful. I need to test it further.