http://www.aliexpress.com/snapshot/266447413.html
I left a feedback review which was very positive and which I'd like to copy and paste here, but for some reason their reviews take time to appear.
Basically what you see is what you get, and there's no quality issues; frankly I can't see how it could be made any better. Materials are top notch. The air back is permanent, sewed in, but it's rubberized wire and I think should go the distance. There's a metal frame keeping the back concave shape. Raincover included in bottom pocket.
They call it 40L but really I think 30L is more correct. The dimensions 27cm*21cm*54cm give a 30L a box.
Deliver was 2 weeks.
Seller was prompt and communicative, didn't have my selected colour and asked for alternate.
My impression is that AliExpress is quite safe, with usual provisos (stick with high volume, high feedback sellers). Someone at AliExpress actually checks your order before it can proceeed, unlike eBay - and checks the seller is legit, I'd imagine.
Obviously the brand isn't going to win you any cred points but I don't care much for that. The only 'Chinglish' is on the tags which you cut off (pic attached, it's level 10 Chinglish!). For the price, about $62 AUS, I consider it a very good deal. Obviously current currency rate will come into it; if you could get it under $50 AUD it would be a dead set bargain. The price includes delivery.
This seller has many different models to choose from, something for everyone, and most daypacks cost less than this. Do check dimensions for size rather than trusting the litre capacity.
Lots of pics on the site but will attach some of my own. BTW I'm 173cm tall and it fits just right.
Also bought a bum bag while I was there, it's fine too.
Inside
