Part 1. Definition
You are given a review about a place. You need to provide a rating from "1 star" to "5 stars" for this place.
Part 2. Example
Although I did enjoy the food here, I was completely unimpressed (and slightly annoyed) by the overpriced margaritas. I ordered a platinum which contained "fresh" juice. It tasted like it had sprite in it, so I thought surely she gave me the wrong one. It turns out that "fresh juice" is really margarita mix on tap from the same gun as the sprite. I asked for something fresh to replace the horrible margarita and received a rocks glass with just muddled lime and a salted rim. I'm not sure it contained any tequila. Horrible! It's not that hard to make a fresh margarita!
Answer: 2 stars
Explanation: The writer has been annoyed in this place and has enjoyed the food. So, "2 stars" sounds reasonable for it.
Part 3. Exercise
After a 3-day drive from California to Wisconsin, I took my mom to this restaurant in hopes of reassuring her that decent Chinese food exists in Madison.

It was 1:30pm, on a Wednesday, and when we walk in to the dimly lit, empty restaurant, the two male employees (waiter A and B) stare at me and my mom blankly. We ask them if they're open for lunch, and they say yes.

Then waiter A takes two menus, walks over to a table and drops them down, and goes over to lay down a tablecloth over another table. My mom and I walk over to this table and seat ourselves.

We figure out the menu, and wait to order. And wait.... and wait.
Waiter B, who is sitting behind the counter 10ft away from us the entire time, seems to be tremendously engrossed in his phone. So much so that we watched as he walked over to his charger to plug his phone in, and continue twiddling his thumbs, both metaphorically and literally.

After five minutes of wondering whether that Time article about millenials was in fact about this employee, he looks up, sees that we need to order, and _proceeds to ask waiter A to come back out and take our order_.

Waiter A comes out, has to hang up the phonecall that _he_ was on, and finally takes our order.

Our food arrives relatively quickly (in fact all four dishes took less time than we had to wait to order), so at least the kitchen is competent.

Not surprisingly, Waiter A, the same guy who "showed us our table" served the food by dropping it on our table, and walking away.

In the end, the food was great, but what passes for lunchtime service will leave a bad taste in your mouth.
Answer:
2 stars