Very well done!

A couple of very minor corrections.

1) Capital 'A' on American as it is country name.

2) Add in the preposition 'for' before 'more'

3) No need for the extra comma after delicious, it is unnecessary in the structure.

Keep it up!

Rx 

Review of Pizza Hut

Pizza Hut is an aAmerican restaurant. Most of them are in shopping centres like square San Miguel. The restaurant is decorated between an elegant and a cosy style. They even have pop music playing in the background. They serve a wide variety of Italian food and they specialise in pizzas and pasta dishes. The food is so delicious and cheap that you will want to ask for more. While the food is delicious, and the atmosphere is cosy, the service is terrible. When I ate there, I had to wait one hour to be attended. I wouldn´t go back there unless they improve their service.

Review of Pizza Hut

Pizza Hut is an american American restaurant. Most of them Pizza Huts are in shopping centres like square San Miguel. The restaurant is decorated between an elegant and a cosy style. They even have pop music playing in the background. They serve a wide variety of Italian food and they specialise in pizzas and pasta dishes. The food is so delicious and cheap that you will want to ask more. While the food is delicious, and the atmosphere is cosy, the service is terrible. When I ate there, I had to wait one hour to be waited on attended. I wouldn´t go back there unless they improve their service.

Firoelly, I suggested using "Pizza Huts" in the second sentence because the switch from singular in the first sentence (Pizza Hut is an American restaurant) to a plural pronoun in the second sentence (them) was jarring.