The testers over at our review partner Digital Trends took the 80GB Zune from Microsoft through the paces and published a review.

Quote from the review: "The 80GB Zune has undeniable cool factor, given its big screen and built-in WiFi. But rather than trumping the competition, it falls in that gray area between the somewhat ho-hum iPod Classic and the rip-roaring iPod Touch.
We applaud Microsoft for trying to make the hardware and software as un-Microsoft (read: user-friendly) as possible, but even this second-gen model has some kinks that need working out. And although we love the wireless sync and recently upgraded song-sharing features, we hope future generations will include more practical WiFi features like a Web browser."
Read the full Microsoft Zune 80GB Review.