I've taken pistol, defensive shotgun, and defensive rifle training at Frontsight, a basic pistol with Gunsite, and a MAS40 with Masaad Ayoob.
Frontsight is extremely cost-effective. My Ambassador membership cost me $100, and includes all classes, for life. Can't beat that. I believe that Frontsight is an outstanding choice for new handgun shooters. The coaches and instructors do a great job of creating an environment that helps new shooters deal with phobias, and older shooters overcome some pretty bad habits. I've found no scientology, MLM, or other non-shooting distractions in my visits there. The techniques taught are basic, but sound. The advanced courses were more fun, of course. Note, advanced courses often use a hot range.
The Gunsite course was detailed, and professional. Taught here in Utah, it included a run through a local shoot-house. Instructors were very experienced, and proficient. Techniques were also sound, and 1911-appropriate.
Mas' course was heavy on the law. Happily, the range days also exposed me to some new concepts that have worked out very well for my shooting. Worth every penny.
I've walked away from each of these courses (and many less formal training sessions elsewhere) with lots of techniques. Some I adopted, some I considered and put on the shelf, and some I rejected as inappropriate for me. It is great to have lots of tools in the toolkit.
My hope going forward is to take at least one formal, professional firearms- or self defense-related class each year.