I've only looked at the Fluency Pods website, I haven't tried the device. I tried the SpeechEasy, and my company, Casa Futura Technologies, has sold about 10,000 DAF devices since 1992. First, the Fluency Pods' "Clinical Studies" lists four published studies: one with my School DAF, one with SpeechEasy, one with the Fono Tools software, and one theoretical article that isn't a "clinical study" at all. There appears to be no peer-reviewed evidence that Fluency Pods have an effect on stuttering. SpeechEasy devices were found to be effective for reading aloud alone, for a few weeks, and then this effect wore off. The device had no effect in conversations. (Pollard, JSLHR, April 2009) In contrast, my website lists about twenty clinical studies using our devices. The study that Fluency Pods appropriated found that our School DAF reduced stuttering 70% immediately without speech therapy, and using the device 30 minutes per day for three months resulted in 55% long-term carryover fluency, i.e., the subjects' speech improved over time and they needed the devices less and less. Second, the website provides no specs, particularly about frequency range. Hearing aids typically amplify in the 2,000 to 8,000 Hz range, far above the 125 Hz fundamental frequency of a typical adult male. SpeechEasy gets around this problem by shifting the frequency of your voice up 500, 1000, or 2000 Hz. This introduces some other problems, but at least they did something to address the frequency range problem. Without hearing your vocal folds it's going to be difficult to develop vocal fold awareness and control and develop long-term carryover fluency. Third, I see nothing about hearing and hearing safety. Does the Fluency Pod block your hearing in one ear? Children need to hear their teachers and adults need to hear where traffic is coming from. If your Fluency Pod picks up and amplifies environmental noise, when you're in a noisy environment such as a bus stop, the device could be loud enough to permanently damage your hearing. With our devices we provide noise-cancelling microphones that pick up only your voice and reject environmental noise. We also have bone conduction headphones that don't block your hearing. Fourth, the Fluency Pods are monaural (one ear), which is 25% less effective than binaural (two ears) DAF. Fifth, the delay is fixed at 70ms? That's fine for people who stutter mildly who want to speak at the normal speaking rate. But I stuttered extremely severely and had to use a 200ms delay to do one-second per syllable stretch, or five times slower than normal speech. My most fluent speech, reading aloud alone, was ten times slower than normal speech, so five times slower was a big improvement. Sixth, the $3000 price is steep. Our School DAF is $795. Most Americans who stutter can get our devices free from their states, the VA, etc. As others have noted, there are downloadable apps that are even cheaper, although the quality of some of these apps is questionable. Fluency Pod might be paying $100 for inexpensive hearing aids, reprogramming the software, and spending 90% of your $3000 on advertising. My company doesn't spend money on advertising so we keep our prices low.