Windows 7 and Speech Recognition

I thought I had a pretty decent headset and I'm using it with Windows Live Writer and it seems to work OK.  I'm using a Plantronics headset that that has a USB connection. I probably should train the windows speech recognition software several different times to make sure that it has a good sense of my voice to work with. I seem to be spending a lot of time correcting misrecognized words as I am speaking initially.  I'm wondering if there's too much hiss or if I don't have the microphone placed just exactly right.  Well, as in all projects they seem to be ongoing, and ongoing.  I was hoping that I would be able to speak at a normal speed it not have two very carefully enunciated each and every word but if I do slowed down what I am saying it has quite a bit more accuracy.  So, that is obviously the best way to work with it.  You need to speak up slow down your speech and concentrate on not slurring your words and pronouncing them clearly. As I've made some slight adjustments in the way I am speaking to the speech recognition software, the accuracy has increased considerably.  I'm having to make fewer and fewer changes and I am beginning to speed up slightly and still maintain the accuracy as long as I work on enunciating my words as clearly as I can.  So much for this test you can see the accuracy has turned up pretty well.  I still like the fact that windows still has included the speech recognition software right in the operating system so that it can be used in all windows based applications.