My site has a lot of content and interrelations - over 100 articles on student rights. mod_related_items gives lists of 20 items or more that users have to scan to find what they want. mod_ludo_related_items allows display of just the keywords the items share, and a link to search on a particular keyword, bringing up only articles that share that keyword. So I turned off the links to related items display, and just use the keywords. Simple installation. This is my first impression, the site is not live yet, will update if problems arise, but so far it is great.