best one would be cesar gracie in pleasant hill, nick diaz, david terrel, gil castillo all have fought in the ufc and they train there. gilbert melendez and jake shields fight in japan and they train there as well. and alot of other dudes who have fought in smaller shows train there as well. any time you go in there you can find 4 or 5 pro fighters training. very friendly atmosphere. not a place where you gotta call the instructor master and they claim they fought in underground death matches. and have secret techmiques that can kill 37 men in 12 seconds. since the majority of these guys are either active fighters or about to be they only train what is really gonna work