Just today I bought a MZ-N505...this the entry level NetMD by sony....
and i am returning it tomorrow and waiting until there is a Windows version of the Ipod.
Reasons
1- Install the Sony OpenMG software. Then you have to "import" your mp3's into the software library if you want to add them to a disk....no problem...however, took me a while to see what it was really doing.
I store my mp3s in my documents\music...OpenMG was making a copy of the file and encrypting it and putting it in its own directory. I have 3gigs worth of mp3's on the machine, if I used this method I would need twice the storage space to be able to add any song to an MD on the fly.
2- It seems to have a problem with Mp3s sampled at over 128 or 192...haven't gotten to the bottom of this yet. When I rip cd's I usually sample them very high, maybe at 228, it sounds crazy, but I don't worry about space, just don't like crappy music quality.
3- The OpenMG software crashes every so often.
4- Because sony is using encryption and other rules relating to digital rights and all that crap, a song can only be copied or "checked out" as is call 3 times. if you want to have it on another md, you have to "check in" the file and then it allows you to added to another disc.
I am dissapointed since i like MD's, my sister has a regular md and i think its great....
hope this helps, feel free to PM if you have any questions