The French teacher in my building was using this last week with speaking French. It was a really neat idea and the first time I heard of or saw this tool. We did have a problem uploading the recording. She was using a brand new Macbook cart (first teacher to use it) and she had the students record in garage band then try to import. The problem came in the fact that it looked as though the file was uploading but it would never show up.
The technology integration coach and myself (technology advisor) spent 3 periods trouble shooting this problem. We pulled a macbook from each of the 4 carts as well as our own. I had to go to class so I didn't see the conclusion but from what I was told the problem was with using Safari. I'm told that Firefox worked fine.