Hi Tessa,
I purchased an Olympus WS700M for qualitative interviews for my PhD dissertation. As a backup device, I used my iPhone’s Voice Memo application. Surprisingly, the iPhone produced much better sound quality, was easily uploaded to iTunes, and could then work with the audio file. If I had to do it again, the iPhone would be my first choice, keeping in mind that you should delete your files once uploaded and backed up, so that you’re not carrying around your interviews that could contain confidential information.
Good luck,
Danielle