Myself and my buddy are both training whores, and we have invested thousands of dollars of training at the Sig Sauer Academy.
We have been to other locations, near and far, but for some of the classes at Sig, and the reasonable driving distance, you can't beat it. (Unless you are looking for a Magpul Dynamics or Blackwater type class)
Frankly, we are done taking general admission courses (civilian) because unfortunately in every class you end up with one Yahoo, or retard that souldn't be there and it slows the class down a lot. Our opinion is, when you're there, you are there to TRAIN, not be in an "advanced" class and have to show people how to draw spare mags and load them into their handgun, etc...
One class that was taught by Scott Reidy from Nashua PD is the "Patrol Response to an Active Shooter" (or Active Shooter Response) is what it is called on the site. Scott is on Nashua's SWAT team, and he runs a great class for LE.
The primary "in-house" instructors are great; a lot of knowledge and background with the guys.
If you have any specific questions, feel free to PM me or ask here.