Well, a travel friend has been trying to get me to switch to packing cubes, and today I actually received surprise: a set of cubes in the mail! (Thanks, Mahlona!)
She has also emailed me photos of her cubes and what goes in them. So I guess I'll give them a try. We're taking a long weekend trip to Houston in about 6 weeks, so I'll try them out then.
I've been a confirmed user of 2-gallon freezer quality ziplock type bags, and have had great results. The only downside I've found to the bags is the temptation to overpack. The first time I used them my bag was about 5 pounds heavier than it needed to be; I had all that space left, so why not use it? Right?
I use an Appenzell backpack, and have no trouble packing everything I need for a trip of any length. My generous friend also uses a backpack, and hers is a bit smaller than mine. (Of course, she's about half my size, so her clothes are tiny.)
I know there are devoted cube fans out there; I'm sure you'll be giving me tips. And when we get back from Houston I'll report on how the cubes worked for me.