As a former developer of speech synthesis at the phoneme level for 30+ years before I completely lost my vision, this product makes great use of text-to-speech dictionaries that I helped build over the decades. At first, I thought this product was a replacement for the iOS built-in VoiceOver screen reader, and then I rediscovered it as my hypothetical childhood dream when my computer life began in 1982 in terms of software development. Over the decades, I have been an alpha/beta tester for third-party speech synthesizers. So, when I heard the synthesis of the acapela voices in Voice Dream Reader, I was overwhelmed of how speech synthesis systems has greatly improved just over the past decade!As for customer service, I give an A+ for helping me understand what this Voice Dream reader app is all about, as well as, fixing a minor technical problem in a timely manner.Starting off, I began reading at 180 words per minute, and then, gradually increased to 460 words per minute, however, I quickly realized I was running out of eBooks to read! So, I went down to 220 words per minute for all voices. Instead of 2 to 3 eBooks a day, I changed my goal to 2 to 3 eBooks per month.In addition, listening to eBooks with Voice Dream reader helps me sleep BETTER, despite the product was never designed to be a sleep-aid.As a lifelong developer of speech synthesis systems, now retired, I highly recommend this product for those that are visually-impaired or totally blind, as the non-VoiceOver voices sound much better!