It's hard to swallow $500 for the DS-3500, and even harder to justify the extra $100 for the DS-7000, when the DS-3500 delivers almost all the same features. The strength of both of these devices is in their security features and content-management software.
Fast and responsive; Sensitive mic; Large recording capacity; Index marks on-the-fly for noting important points in a recording; Can adjust playback speed without affecting tone; Voice-activated recording; Real-time file encryption and password protection
Very expensive; No automated transcription; Takes time to grasp features and software