The amount of time they put into each client project, their attention to detail in terms of strategy development and implementation.
We are able to track all aspects of communications campaigns from start to finish without having any issues with tracking or reporting. They have been very responsive when it came to questions we had about campaign metrics as well as providing suggestions for future projects that would be most beneficial to us. I am not personally familiar with this service provider but my experience has benefited greatly by working closely with them during several past engagements.