Well I ordered one, not from the link but a similar seller. It took a week and a half to come from China (I am in the UK). Actually it looks pretty good. The switch is slightly hard to manipulate but I guess that stops it switching itself on in your pocket. In any case I have confirmed that I can make a recording while carrying a baby in one arm so it serves its purpose. The recording time is way more than required, something like 10 hours with a 1GB TF card (the memory card did not come with it but I had one lying around). If I had an inbox of 10 hours of audio notes then I would have a major problem! The sound quality is pretty decent to my ears, here is a sample:
The format is mp3, even though the advert said it was wav, but that's not a problem. It saves one audio file per message which, now I think about it, is handy because it allows me to process the note before moving on to the next. There's no headphone jack so you have to connect it to the computer to listen to the notes. The only criticism I have of it is there is a two second delay between switching it on and recording- an led comes on to show that recording has begun. But I like the simplicity of it and it only cost a few bucks.