spree-contrib/spree_reviews

<div id="reviews">
  <%= render 'spree/shared/rating', locals: @product, review: 0 %>
  <% for review in (Spree::Reviews::Config[:track_locale] ? @product.reviews.localized(I18n.locale) : @product.reviews).default_approval_filter.preview %>
    <%= render 'spree/shared/review', review: review %>
  <% end %>
  <% if Spree::Reviews::Config[:feedback_rating] && (!Spree::Reviews::Config[:require_login] || spree_current_user) %>
    <%= link_to Spree.t(:write_your_own_review), new_product_review_path(@product), class: 'btn btn-primary' %>
  <% end %>
</div>