Your hostmonster review should be an unbiased and objective discussion of what the webhosting service can really offer its clients. It gives equal discussion on the strengths and weakness as a webhost you neither exclusively talk about the good things nor focus only on its disadvantages. A balance of both will help your readers make a more informed choice.
Of course, you must have experienced using the services of Hostmonster yourself. Dont include in your review anything that you havent tried yourself, or else youll be giving inaccurate information and that will affect your credibility. Some readers might not refer to you for future reviews anymore. Ideally, try out all the services of Hostmonster first before starting on a review, or writing various reviews on each service or package as you experience them.
Lastly, try comparing it to other webhosting services. Try to figure out which kinds of webmasters will be able to make the most out of the services. Thats the best way to illustrate how this particular website fares in the webhosting industry.