What do you like best?
LexisNexis has several advantages over its competitors. The main one is Sheperd's, which is the gold standard for determining whether your case is good law still. Lexis has also made strides with its searchability to make it close to its competition. Finally, lexis provides pincites for some jurisdictions lacking in its competition's libraries, such as Virgin Islands law.
What do you dislike?
Its search is not as strong as the competition. Likewise, sometimes less cases and sources are linked to additional sources and resources on lexis than on the competition's.
Recommendations to others considering the product
Shop around for your best price. Negotiate and only subscribe to the services you need.
What business problems are you solving with the product? What benefits have you realized?
Legal issues. I have realized the benefits of finding necessary case law.