What does the company do well? It is an everpresent part of Salesforce's appexchange community, so isn't a platform that is untested or likely to go away at any point.
What does the company not do well? It is an ugly implementation. Your org is swarmed with objects, permission sets, apex, depreciated functions. You're also kind of left to adopt it out of the box, with any config left to the purchaser to drag over the line. One finance rep said it was the worst implementation they have ever been part of.
What about the company do you wish you had known before purchasing? How truly significant the implementation would have been. It budgeted a Salesforce resource, 50% of the time, for a few months. It had 3 to 4 of us flocking around it and two project managers.
I would like to have seen a PoC first and possibly one from a competitor like Sage Life.