Frankly, as an experience LEED AP but non licensed professional, I find the LPEs frustrating and a bit insulting. I'm in a much better position to understand if the project meets or does not meet the requirements of LEED than my registered co-workers and boss. Yet, if I can get them to do the documentation, they have a much shorter path than I do. Since I wind up doing all of the final credit verification and bat clean up on the documentation, it adds to my workload. I find it only helpful when dealing with recalcitrant consultants.