Jim I.wrote a review of Eagle Creek Pack-It Quarter Cube on December 31, 2012
I've had this bag for 5 years ago and it looks as good as the day I bought it. I use it to keep underwear and socks in when travelling; it holds plenty. I really like it because it solves the problem of digging through your luggage every time you want a fresh pair. I don't take it on hikes though, I think it would add a bit too much weight.
If the bag gets dirty, just toss it in the washing machine, it comes out looking good as new