Only when using WDS. Which apparently is a pain or non functional at all with non-apple-devices.
It is a pain even
with all Apples.

Rock solid when it is up running, though, but the bandwidth penalties... Yuck!
I base my statements on what I've experienced myself and what people are reporting actually does work for them, what do you base your scepticism on?
While this specific response wasn't directed to me, I'll chip in:
Actual experience with the devices in question, Apple's specifications and KB articles and the fact that I've never ever found someone successfully claiming that it works, the only reliable posts state that it won't work.
The old G version, yes. You don't need WDS if you're just after using the Airport Express as a "wireless dongle" to a product that doesn't have wifi capabilities. It's to make it extend the wireless network that you need WDS
Funny that Apple won't agree with you, those darn liars. They probably have a hidden agenda to force you into updating to a newer Express...
http://support.apple.com/kb/HT2272
If you want to call me a liar, that's absolutely fine. I'm an anonymous person on the internet, of course I have no authority. And since I'm not running it at home, I can't give you exact specifics of how to set it up. But ask yourself if it's really probable that all the other people on the net (and here on MR) that claims it's working perfectly and explains how they're doing it are also lying...
Touchy, eh?
No, I won't call you a liar, but rather misinformed. I'm rather convinced that you actually believe in what you are saying, thus you cannot be a liar. The problem is not that you are anonymous and on the Internet. The problem is that you claim something that is directly opposite of what official documentation states and that conflicts with my personal experience and the vast number of posts I've read covering this topic.
You have been provided with a couple of links to official pages where Apple states that it won't work, and my personal experience is that WDS is needed. And unlike you, I actually run the darn things at home and have for many years. Would you care to provide links to back your claim about all those people running the 11g to share the Ethernet port on an existing wireless network without WDS? I did a quick search and only came up with a few false positives.
And once again, being wrong does not equal lying. Completely different concepts.
I have both a g and n express with extreme base as main and I find that the g's are less reliable and cannot be reset with airport utility on iPad. The new airport utility doesn't play as well with them either. I always get issues with update not applied or such things. When the g works it's a tank, when it doesn't play, it doesn't play nice.
Yeah, pretty annoying that the new Airport Utilities refuse to play with legacy hardware. It is definitively going to cause me problems down the road, having to power up some archived old hardware or a virtual machine just to reconfigure the Expresses.
