I use it as part of my final dissertation and it's perfect! I used it in interviews, the sound is very clear, the background noise is largely mitigated. There are 4 or 5 files to record the interviews in an orderly manner. Very little is forgotten very quickly and thereby hinders absolutely not the respondents. It is also very easy to use. It works with batteries. No USB port against, we therefore can not transfer the recordings on the PC. Various playback speeds for a pleasant transcript. I received it quickly in 3 days. I recommend to the students!