You are given a review about a place. You need to provide a rating from "1 star" to "5 stars" for this place.
One 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!
Solution is here: 2 stars
Explanation: The writer has been annoyed in this place and has enjoyed the food. So, "2 stars" sounds reasonable for it.

Now, solve this: I was driving on a road trip from Ohio to Virginia and my parking brake light turned on while I was on the highway, so I figured it would be safest to pull of the road and have it checked out before I kept driving; this one happened to be the first one off the exit. Lu was quite the character: friendly and knowledgeable and Mike and the other guys were very friendly as well. Lu got us in and out. He saw that the brake fluid was low and added some fluid for free and then put my car up on the lift and inspected the brakes just to make sure. I was back on the road in no time and I'm so grateful for their friendly and fast service. Seriously, these guys were great. Lu also took the time to describe and show me exactly what was going on with my car and so I felt safe hitting the road. The problem was fixed and I appreciated their help so much, I got to my destination and created a Yelp account just so I could let everyone know what a great group of guys work there. Thanks!
Solution:
5 stars