Pocketables corroborate 25 audio 5 video, they say the screen is pretty poor compared to the clix 2, but acceptable.
Speakers are tinny, the SD support is poor and the sound quality isn't that fantastic (in their opinion) compared to something like the Gigabeat.
"Good but not great"
YouTube - iriver E100 demo
Review: iriver E100
I'm sort of willing to forgive the screen and speakers as it is an economy player compared to the clix2 but if someone else reports less than stellar sound quality I might skip it.