H+K was always great at helping provide ideas on messaging and goals for on of our large corporate citizenship campaigns. They were able to drive the planning process with their insights and personal contacts with decision makers and other key stakeholders. This included programming for the day, invitations to top executives, and media relations.
High-level advice: always spot on and holistic in perspective.
good ideas on how to execute: planning is definitely a strength, even if actually doing it is an area for growth
Staff augment: asking them to do a quick turnaround project that was something of a heavy lift did not always yield positive (or timely) results. You can only ever get two of the following three qualities in a consultant at any given time: cheap, good, fast. H+K might only be good.
Use them for the big think and figure out someone else to do all the little and necessary stuff.