Too much negative responses and not enough of us happy users responding so I think I will throw my two cents in. I sold my Ipod 3rd gen back last Christmas to some trend follower for about 270 bucks (after using it for 6 months) just so I could buy the 40 GB version of the Zen Xtra. At first I was a little pissed because this thing was not syncing well and all that and then I realized it was the USB card I had that was the problem (ALI chipset is bad). After switching to another chipset the thing synced like a dream.
I am not going to lie to you and tell you that the creative manager software is good, because its not. Nothing can compare to the ease of syncing as with itunes. However, now that Real Player supports the Zen Xtra players, we have a great piece of software that is available for free that does most of what itunes does.
The player itself has great battery life, even with my collection which is mostly 192kbps or greater bitrate, I still get 12 hours or more on a single charge. The ability to pause a song that is playing and preview another song comes in handy if you have a lot of music that you haven't listened to in a while and you are flipping through your library. The playlists are pretty powerful, you can make permanent ones, for whatever your mood style. You can also delete and edit your playlists and your library which I find very handy when I hear a song that is poor quality and I want to remove it from my collection so I can replace it with a better quality one. The bass is good, and overall the audio quality IS definitely better than the 3rd gen ipod was. The ability to search is also great, you can search by artist, song, album or genre. This comes is handy when you have large libraries as would be suggested by the need for a 30 or 40GB player.
The cons are obvious, since this player uses a laptop drive its heavier and slightly bigger. But this can also be a plus because you can replace it with whatever laptop drive you want, like the guy who put in the 80GB HD. This player will grow with your library if you want it to. The little doodad on the side that lets your scroll through your library is not all that great, the Ipod has it beat. But consider how much time you will actually spend scrolling through a library of 4000 or more songs and you will realize it is not a big deal. When you factor in the ability to search, the need to scroll is not as important as it is in the Ipod.
But despite the cons listed, I feel the biggest benefit of owning this player is the ability to pop in another battery when your current one dies. You can easily get two batteries and be able to swap out the dead one while you are on say ... a long plane trip. No matter how many ways you can charge an ipod, if you are going to be without electricity for more than 8 hours you are screwed. By getting another battery (cheap on ebay) you can extend the range of this player up to 24 or more hours depending on the bitrate of your collection.
Well that's about it, despite its weaknesses I love my Zen Xtra, because in the end, I am not going to be looking at it all the time and nor will I be able to tell the difference in a few ounces when the thing is in my pocket.