It includes a discrete speech engine which allows me to dictate at approximately 50 corrected wpm. I use this product for the vast majority of my computing needs. This is a Continuous Speech Recognition product. I don't use this product as much as I could. However, the nature of my neurological problem causes a great deal of pain.
Vocal patterns change with an increase in pain, level of relaxation, and overall mood.
Those who do use it regularly can achieve greater than 100 corrected wpm consistently. Some power users exceed 150 corrected wpm. The key to obtaining satisfactory results with this software is proper and adequate training during and after installation. I'm not very fond of the Microsoft method of marketing or their highly lacking products. If you haven't tried it give it a shot.