I am extremely disappointed in this product. I tried two different boxes and had similar issues. Constant buffering, video breaking up and on screen messages that said my antenna signal was weak. The antenna message is very odd since I have a high end outdoor over the air (OTA) antenna that I use for my TV without any issues. There is also an issue with the audio and video being out of sync. I truly wish this product worked as advertised as I have been looking for a reasonably priced device to record OTA programs but this is not it. Amazon needs to improve their technology and R&D before I would buy or recommend this product to anyone.