Design Technica has published a review of the iRiver H10. The H10 gets mostly high marks, but Design Technica does have some useful feedback for iRiver [Via Digital Media Thoughts]:
The H10 digital audio player is definitely a step in the right direction, and is a very strong first offering of this kind from iRiver. We did not experience any real problems throughout the review process. The H10 did not lock up on us, battery life is above average and it works seamlessly with Windows Media Player 10. The overall usability of the H10 is second to none. That's also one of its shortfalls.
We love the color screen, but have to question its usefulness since it doesn't show album art and the player does not output stored images to a TV. We also love how it interfaces with Windows Media Player 10, but other than Napster To Go and maybe MSN Music, those are the only services iRiver actually acknowledges the player works with. And lastly, while the ear buds fit comfortably, they just do not sound as good as those that come with the Apple iPod or Creative Labs Zen Micro. We also wish the H10 had more power output per channel to help eliminate the massive distortion we encountered when playing anything with bass. As it stands though, the H10 is a great player that you should consider.