What do you like best?
Easy Integration with TIBCO ESB and possibly any other message oriented middleware.
SOAP webservices support
Very good internal data model
Fuzzy text search with Netrics.
Decent tech support.
What do you dislike?
1) User-Role permissions (resource security) is a nightmare to manage. When you create a new role and assign a user, the user will have access to everything (has "most privileges"). This is contradicts the standard Identity and Access Management (IAM) principle where a new user is supposed to have "least privileges".
2) No RESTful web services..
3) Cross-environment deployments are really hard. Not everything can be automated.
Recommendations to others considering the product
Stick to the out-of-the-box features. Keep your MDM simple.
What business problems are you solving with the product? What benefits have you realized?
For mastering Individual, Organization and Address information.