A safari holiday can be an amazing holiday, possibly one like you have never experienced before. They usually cost a fair bit of money which is why you need to ensure that you book the right package to give you the best experience.
Websites such as Trip Advisor are a great place to start as you will often find a number of honest and non-biased reviews on a wide selection of resorts or parks which can help you make your decision.
When reading reviews, you need to decide what is important to you. It may be that you want to find somewhere where the accommodation is very near to where you will be doing the safari or that you may want to make sure that cleanliness is a top priority. Obviously, each person has different expectations and you need to be aware of this when reading any reviews. It may be what one person regards as clean another person may states is not acceptable.
With regards to safari holiday reviews, you cannot always rely too much on the reviews of the actual safari experience in terms of the animals they have seen as each time you go out on a safari it will be different. One person may go out and hardly see any wildlife and leave a bad review and the following day the trip goes out again and they have an amazing time.