My 3500 is great just like the others that have commented. I did have one NEC faliure and that was my original DVD writer and it was a 1300A, luckily it was under warranty and so I got the 3500 as a replacement as the 1300 was not being made when the one I had died. It has served me well over the last year, and I hope it keeps it up.
The only problem I had was it would not read Datawrite Red tops that it burnt. Recognised them to burn them but wouldn't read them. Solved it by not using them again.