I am probably the wrong person to review this, because I dislike revenge dramas. There is enough pettiness and misery in a normal life to make it unnecessary to add to it, even in the shows we choose to watch. Overall, I found this to be mean spirited and rather unpleasant. People brought their wishes to the diner and usually had to pay some unpleasant price, which just seemed unnecessary. If you have powers like that, why extract a painful price from people who are just trying to make their lives a little better? This thread of unkindness held to the end, and there was really nothing redeeming about it.
For what it is, it's reasonably well done although the writing was unoriginal. If it hadn't ended after 8 episodes, i would have dropped it after 5 or 6, because I don't need to add misery to my days. YMMV, depending on your taste for revenge and pettiness.