It randomly added characters as I typed corrections which made the process, so essential to accurate speech recognition, extremely long-winded and frustrating. The last (otherwise very good) version was ruined for me by the corrections interface. Unfortunately, the interface built around it was usually terrible- ugly, buggy and extremely prone to crashing. When Nuance took over the basic speech recognition engine became the same superb one as used on Dragon Naturally Speaking for Windows. Every version has ultimately disappointed.
I have tried every incarnation of Mac speech to text software, starting with iListen before it was acquired by Nuance and working my way through DragonDictate and the renamed Dragon Professional Individual for Mac. Speech recognition on Apple’s machines has been an area in which they have lagged well behind Windows. Over this period I have primarily been a Mac user.
I have been using speech recognition software for years now, mainly to let me write when my RSI and assorted ergonomic related ailments got too bad for me to type.