I love my AirPort Express, now that it works... I had problems from the beginning of setup with the Apple Software. I followed the excellent advice from the first spotlight reviewer, and my AirPort was now a part of my wireless network. I had a little more trouble with my printer. I have an HP Photosmart 7760 (great printer, by the way) and it is "not supported" for use with an AirPort Express per HP. But not being easily deterred, I searched the net for a solution. I found these two sites which greatly help those whose printer is "not supported" or easily installed for whatever reason.
To print from a Windows XP computer to a printer on an AirPort base station, go to http://www.efelix.co.uk/tech/1004.html and follow the directions. It's a great site with pictures and step-by-step instructions.
If your printer driver is not found or supported, go to http://www.efelix.co.uk/tech/1012.html and follow the directions. This site also has pictures and step-by-step instructions.
I hope this is helpful and removes a little of the stress of setting up your AirPort on a Windows XP computer.

Within 5 minutes from out of the box, I had this out and working. Range is great, and it was very easy to set up the security. Couldn't be a better product, does exactly what it is advertised for, and the 5 different sets of settings make it a truely mobile wireless base station, haven't seen a better one yet. I have used both Lynksys and D-Link and they do not come close to ease of use and quality.

Do yourself a favor and follow the steps written by Scott P. Jones :

"More Clear Windows Help, March 30, 2005
Reviewer: Scott P. Jones (Seattle, WA)"

I got set this way in 10 minutes!!!!

Now, setting up PRINTER was more of a challenge for me. I followed AirPort's Setup Guide on p.21. Point (6) tells you to fill in the port name, etc. Pay attention to "NOTE" and instead of 10.0.1.1 put in your Base Station's IP address (You can find that by going to: AirPort Admin Utility -->Base Station (highlighted)--> IP address (3rd line).

Then follow all the rest of the steps and you are all set!

I also had issues in setting up the Apple AirPort Express with Air Tunes, but actually benefited from the instructions posted here for Windows. Follow the instructions posted on October 8, 2004 by Mark R. Conway and you'll be fine. The only thing he doesn't mention is you have to know your wireless network name. Once I figured out how to get this, it was a snap.

Bought this for use with a pre-existing wireless setup. First off, the manual. It's awful. Wait, no, it's worse than awful. It's a complete and utter joke. If you buy this thing, be prepared for some frustration. And if you think calling Apple support will help, think again. The genius I got tried to help me set it up after I failed at it miserably for 2 hours and he ended the call by saying, "Well, I guess this won't work with Windows XP Service Pack 2. Please load that or else return the device." Real freakin' nice! And Apple fanboys spout all the time that Apple support is so superior to every other companys' support. Bull!

So I get off the phone with that "genius" and get on a Mac forum, where the folks there tell me that to connect this device to a pre-existing network, you must turn off the firewall. Where was that written in the manual? Nowhere. I turned it off and VOILA, it works. Why didn't the support monkey suggest this? Why did he blame it on Windows and then run the other way? Well Apple, that poor excuse for a support person and your ineptitude in writing a manual is what cost you 2 stars in my review.

As for the product itself, it functions very well. I haven't suffered any audio dropouts like others have. Just know that you'll need to run without the MS firewall on. I assume you'll need to shut the firewall off on the Mac if you want to use it on an Apple too. That's just ridiculous design. The sound quality is awesome. I haven't attached a printer, but I'll just assume that it will work. Although when you connect the AirPort Express as a member of a pre-existing network it stops being seen by my wireless card, so I doubt I'd even be able to see the printer. I'm just speculating though. I mainly bought this for the music, and for that it's working really well.

I recommend the product, but just know that you're in for a potentially nightmarish experience trying to get it to install, and don't expect help from the manual or from Apple tech support.

One thing that was killing me was when the admin utility was displaying my AirPort Express. The screen was blank, with nothing but a rescan button to look again. Little did I know that it can take a minute or two to find it. So after it comes up and you see nothing, the natural inclination is to close the tool and look for the problem. DOCUMENT THIS, APPLE!