Check the video for sound quality.
Update: I found that if I set the levels correctly, the amount of noise is much less using my Tascam DR-05 recorder. But I actually starting using Adobe Audition to remove the noise from the Audio. It takes less than a minute, and I find that I don't care to, or need to do any audio corrections after that. So the Sony mic, in addition to Adobe Audition's noise correction, has proved to be a winning combo for me. Couldn't be happier with the purchase.