What do you like best?
Primarily I use DME in a direct marketing context to match campaign responders to campaign targets. Together with Address Verification it is the most robust, easy-to-use and cost efficient tool I've ever used. It's also pretty fast. DME doesn't require programming skills to create or fine tune algorithms.
What do you dislike?
The address verification function runs slowly and the user interface takes training to understand completely.
Recommendations to others considering the product
Get a tutorial of the UI during any trial period. The tutorial covers features that aren't obvious (or are confusing) to a new user.
What business problems are you solving with the product? What benefits have you realized?
I use DME for direct marketing campaign results measurement. Benefits are better results (i.e., more matches with higher confidence level), faster turn-around time, transparency into the algorithms, and no requirement for SAS, SQL, etc., programmers.