[streetcar]

Are the kareoke and the lenguage leaning modes on the newer sony walkmans quite good, or just gimmicks?
 
How is the s755 compared to the s639?

 

[andrewinukm]

I don't think the karaoke mode is available for those sold outside Japan.
 
The language learning mode is pretty useful for those language tutorials. The 3 second rewind is very useful when replaying a sentence.
It's also useful when listening to audio books or podcast... i can keep repeating a line until I can grasp what the speaker is trying to convey.