If you are using a Mac then I would recommend Mac speech dictate which uses the Dragon recognition engine. The accuracy of the recognition is very close to that of dragon on a PC however, it lacks a lot of the usability options that we love about the Dragon. It is harder to proof read and correct your work on the Mac that it is using dragon on the PC.
Interestingly, I have been speaking to Nuance about a lot of the services such as spin vox and there is still quite a lot of human intervention needed in order for transcription to be accurate.
I am actively investigating the possibilities of speech to text on a mobile device, as the hardware capabilities similar to that of the desktop computers that I first used for speech recognition Way back when.
I dictated this
