Mshan:
I have an Airport Express and I got the Monster kit to go with it.
I cannot comment on the sound quality but I can try and describe the build quality for you a bit. Since pictures of these cables are few and far between, I'll describe the cables in a bit more detail too.
Actually here is a good pic:
http://images.chapters.indigo.ca/Ima...8728420_lg.jpg
First off the mini-RCA cable, is about 6 ft maybe, and is labelled as "iCable - Balanced Audio Interconnect with microXLN, Double Helix Construction, Duraflex Jacket by Monster Cable". I have no idea what microXLN is supposed to be or what they figure is "balanced" about the cable.
It seems to have gold plated jacks and the RCA connectors fit quite snugly onto my Yamaha receiver. Equally the mini-jack plugs quite solidly into my Airport Express. The Cable is of a reasonable thickness, and has a fairly flexible jacket - it doesn't retain any fold patterns in the wire from packing or anything. At the RCA end, there is a plastic body that splits off the cables and from there you get maybe 2.5 inches of wire until you hit each RCA jack.
It matches the Airport Express quite well if you care about that. The RCA plugs don't have a terrible big body to grab onto, unlike the typical Monster plugs you see in Best Buy/FutureShop.
My optical cable is still in its wrapping, but seems to have a thinner cable. It appears to be about the same length.
The cable says "iCable - High Performance Digital Fiber Optic Cable by Monster Cable" Both cables say "Made in China", which you probably figured.
The digital cable is much lighter than the analog one. It's probably plastic fibre rather than glass fibre? The ends of the digital cable are either a gold or brass tip and have little clear plastic plugs over them just now. These would get lost in a real hurry... not sure if they are just there for shipment or what. Basically imagine a little plastic hat just barely enough to cover the tip on your ballpoint pen. It's not like some of these plug-covers that you can snap into and are somehow clipped to your cable to prevent loss. Again the white matches well with the Airport Express.
The third part of the package, which honestly was the whole reason I bought it, is the power-plug adapter. Normally the Airport Express comes with the adapter that has the flip-out prongs, and you just jack the whole thing into your wall. I didn't want this. So the Monster kit, has an adapter that plugs into the Airport Express and instead gives you maybe six feet of AC power cable. So you can plug it in, and then put it on a tabletop or something.
Now you could do a few other things to accomplish this, but would ruin the look of the Airport Express, in its sleek white glory.
The alternative options would be - use an extension cord to wherever you want to plug it in (say on top of your audio rack), or pull out the supplied Apple flip-prong adapter and slip in a C7 (C6?) power cable - maybe something from PS Audio/Audioquest, whoever. Even the generic power-cable used by your DVD player should work, if you already swapped that for something better. In theory, the high-end cables would be better power cables, but would not have the same retention of the clip-in Monster/Apple power cable. And neither would have the same finished look of the clip-in cable, or the white colour of the Airport Express.
I'm not sure it would make one damn bit of difference what quality power-cable you use or not... I don't think I'll start trying that sort of tweak until I'm plugging it into some rather more upscale equipment.