Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: A Good option for people looking to use third party firmware.

All the Sansa E 200 series MP3 players are very well supported by Rockbox, for those interested in tweaking their experience with an open source operating system, or anyone who doesn't like the typical limitations of the vendor's original firmware. This particular one is a bit limited in that it can only accept the 2 Gig MicroSD cards, but still a good value.