I'm writing a restaurant review?

So for my journalism class I have to review a diner in town. This is one of my favorite places to eat and I would say all good things about it but I don't want it to look like an ad, you know? Does anyone have any advice on how to review a diner you like without looking like you're brown nosing? By the way, this is the first review i've done and i'm new to the class.I'm writing a restaurant review?
Make a mental note on the menu and wine list(s), cleanliness, décor, atmosphere, staff and hosting, location et cetera. Remember to use detail when describing the food and atmosphere, as well as the other factors named above, discuss the staff and people who may enjoy the restuarant, describe the food, taste and presentation and of course - remember to conclude it with your own recommendations.I'm writing a restaurant review?
Well, just say at least two bad things about it and you can say as many good things about it as you want. :}