I have that one in beige. I bought it probably 3-4 yrs ago. It's been on several disney trips. It holds quite a bit for a small bag, and has pretty decent organization. I usually only need to open the two main zipper compartments at security (just got back from DL trip last week, actually)... so thats a plus when you're considering bags for Disney you have to think about the security 'hassle' factor. ;-) My only complaint about it is that the strap is really long and has two places you can adjust it, and neither of them ever stay where I put them, so I'm always having to readust them. I'm 5'6", slender, and on the short waisted side so I feel most comfortable with it at the shortest length possible. I've actually considered stitching it so I don't have to mess with it any more.
Anyway, my bag has held up really well. $19.99 is a good deal. I think I bought mine on eBags.com for around $30.