All right, I did not time the recording to make sure I actually got 45 minutes on each side, but the tape snapped into place securely, and I recorded from one end to the other without it tangling inside the recorder. When I played it back, it played back smoothly with no skips or tangles. I have used three or four of them without a hitch, but then I generally do rely on Maxell for my taping needs so I was not surprised. I will buy more again when I need more.