As far as the Marantz goes, it worked fine the first month or so, after that, it never finalized correctly. Currently it usually takes 2, 3, or 4 times of me trying to finalize before it does it right. This amounts to a lot of wasted time (it takes 2:10 for each attempt).
Also, I would say 35-45% of the time, the songs recorded to the Marantz CDR play back with severe static/distortion. Thus, it's very hard to hear the actual music. This is not a subtle thing, any 2 year old could notice the severe static/distortion that is created. The static result usually happens for about 7 to 10 days straight, then the burner is fine for about 2 or 3 weeks. It burns fine, no problems. Then it gets back into its static phase for another 7 to 10 days.
That's the frustrating experience I've had with the Marantz. It is still under warrantly, but I haven't taken it into the shop to see what is actually going on with it. I bought this brand new for $499 at GC. I should've spent the extra $50 for the Sony CD burner....