This is your standard musical comedy from the '30's, with a big plus that it features some well known '30's actors in small fun cameo's.
There is not much to the story and basically the movie is all about its fun and 'no-worries' overall kind of atmosphere, with a typical Hal Roach comedy touch to it. Appereantly it's a 'Cinderella story' but I most certainly didn't thought of it that way while watching the movie. The story gets very muddled in into the storytelling, that features many different characters and also many small cameo appearance, when the main characters hit the Hollywood studios.
Of course the highlight of the movie is when Laurel & Hardy make their appearance and show some of their routines. It's like watching a movie and getting a Laurel & Hardy short with it for free. Also Laurel & Hardy regular Walter Long makes an appearance in the routine and James Finlayson (without a mustache this time) as the director of the short.
It's certainly true that all of the cameo's and subplots distract from the main plot line and character but in this case that is no problem, since its all way more fun and interesting to watch than the main plot line and the shallow typical main character.
The movie is most certainly not any worse than any of its other genre movies from the same time period, though the rating on here would suggest otherwise.
7/10

Ouch, what a painfully BORING Sci-Fi movie! And that's especially saddening because the opening 15 minutes were so action-packed and full of potential! During the intro, we follow a bunch of nervous security officers and hired hit men as they chase a doctor who escaped from a mysterious laboratory with a briefcase full of top-secret files. As he's about to reveal the supposedly horrible & inhuman events that take place in the lab, he's executed. Figures From then on, the 'action' swifts back and forth between two locations, the aforementioned laboratory and the rural mansion of a corrupt senator (or something), and it quickly becomes clear that the experiments are actually the complete opposite of disturbing. More like dull, pointless and vague. Scientists selected four random persons without living relatives and it's really really really really important that they speak the truth even though a giant machine reads the content of their minds, anyway. They all hide dark secrets from their pasts and people suffer when get revealed; yet I fail to see how these tests could ever result in a humanity-threatening device. Perhaps I missed something, but I doubt it. The interactions between the patients and doctors are even less interesting to follow, as really none of them have personalities. So basically, "The Brain Machine" just handles about a bunch of lame people living in an awfully decorated room. The film also could have been half an hour shorter if it weren't for a THOUSAND stagnant shots of buildings! The relocations from the lab to the villa and vice versa are indicated EVERY SINGLE TIME by a five-second shot of the places. Either the makers really needed the padding or they just assumed that all Sci-Fi viewers are morons unable to notice a change of location by themselves. Staring at a forsaken pool with a mansion in the background for the tenth time in only five minutes becomes quite annoying, I assure you. James Best's performance as the reverend with mental issues is rather decent, but one man definitely can't save this thing from being an absolute waste of time. Avoid!