Yes, reviews are good features depending upon which industry you deal with.
If you are associated with the eCommerce industry then the review feature is a must from a customer point of view.

For example, if you are an entrepreneur and are into the restaurant business or food delivery business like GrubHub a review feature is a requirement for such business.
1) From the customer point of view, a review feature is required to share their experience, share suggestions, look for advice by viewing other reviews, etc.
2) From a restaurant point, you can instantly reply to the reviews and suggestions shared by the customers. Reviews are the honest way to know what the customer feels about your product or service.

How to add the review feature to your online business model visit: https://www.yoyumm.com/ for detailed information related to review features for restaurants, admin, and delivery staff.

Reviews play a major role in decision making for a customer which is why you can not ignore this feature.

Here are some more reasons in support of having a review feature:
1) The online reviews on your website help your eCommerce business boost your SEO
2) Reviews also play a major role in brand loyalty.
3) Reviews feature connects you directly to your customers, and you get a clear picture of what your customers expect from you.
4) If you consider the customer buying behavior, in that case, a customer always prefers and recommends a product that has good reviews and ration. It automatically becomes the first choice of the customer.
5) Online reviews also increase sales.
6) Customers trust the reviews posted online.
7) As per the customer’s buying behavior, 90% of the customers first check out the online reviews before making a purchase online.

I strongly believe that the review feature is a must in today’s business world. Online reviews can also impact the conversion rate of your website. Read https://www.fatbit.com/fab/online-reviews-impact-conversion-rate-online-store/ for more information related to the conversion rate with respect to reviews online.