Great way to go
Bought into the whole Pack It system and have used it a number of times and now I'm a big believer. Takes a little longer to pack - but well worth the effort because you can pack more, be much better organized (so you can find things quicker and easier), and generally clothes are neater and less wrinkled. I use the tube for my socks and it's great. (Got my whole set up on Black - but if I could do it over again I think I'd get random colors and then it would make finding things that much easier.)

organization!
great for keeping everything organized, packing for a trip now and it's nice to have everything in it's own place and if you buy different colors you know which one to grab instead of hunting around.