I got this thing from Staples with the 40 MIR and hoped it would be a good value but I have yet to get it to burn 1 cd. I just swapped it with the TDK 12x burner I had in there and thought it would work but every cd gets only 1/3 done before it gets stuck, no buffer underruns. I updated the firmware and my ASPI drivers (I'm using winXP and nero 5.5.8) and nothing fixed it. I put the TDK back in and it still works fine, so I took the pacific back to staples and got another one, same problems. Any other suggestions to try before I just take it back for good?