I'm making an identical thread in Karate section. I want to find some reliable ones to visit and see which I like more.
And not much to say, just as the topic says, reliable dojos for MT.
Well I can't compare because I haven't trained anywhere else, but I love training at the SF gym. And if you do a search for 'best muay thai gyms in the USA' Fairtex is usually mentioned. Most of the instructors are thai champions/ex and current fighers. They have direct connections to Fairtex in Thailand. They offer a free intro class in SF and I bet they do the same in Mountain View, definitely check it out.
...Of course big time name + big time reputation + nice gym = high price so be ready to pay to play.