I've only had this product for a week, but have used it for about 4 hours of recording so far and have not had any problems with it. I do wish it had some indicator light while it was recording so as to show that it is indeed recording. I stopped it at it the very beginning of recording a lecture while just general conversation was going on, plugged it in to my laptop to make sure it recorded and then resumed recording. It has worked flawlessly for the 4 lectures. Definitely recommend.