my nec1300a does its job just fine...
Its true that you used to need hacked firmware to burn to cheap media.
But new nd1300a drives come with official 1.08 on it witch has a very high compatibility. Also, on the rpc dvd forums, some of the patchers claim that the burn quality of the nec is actually higher then that of most other burners. thats their opinion tho, i dont have the knowhow to verify that.
However, while i'm able to burn to princo etc succesfully, id rather not use those media as they tend to wear out the xbox's dvd drive faster