I bought this product a month (just wanting to flow along with the technology thing - I am a portable cassette-player lover).
This piece of equipment intrigues me because of it's simplicity and nice sound output. There were some music I changed from my old cassette recorder to MP3 on my PC. I loaded it on this player and the sound was still great.
You could also employ Muvo MP3 player as a temporary computer storage for files without problems (just drag the files in through your Windows Explorer - same with mp3 and wma). I have over 100 mB of document in my MP3.
One other feature of this player is it ruggedness. I mean I've dropped it several times and it still operates fine. So it is a good product for the careless as well.
Besides, I love its removable USB stick, although that might cause the other part to get lost (if you're a forgetful person - like me). Furthermore, it has a long battery life. On the average, a battery might last long for over 12 hours of play. I think that is long enough in my opinion.
On the whole, it's a good piece; simple design, great audio, and very easy to operate for beginners like me who are uninformed with portable mp3 players.