Wow, how timely. I have just spent the day looking at garment bags. There were a whole bunch of them that claimed to be "carryons" and I thought looked more like the size of a standard suitcase. And they look kind of "space inefficient" - like a big giant package with not much contents inside.
I'd love to get one of these:
http://www.skyroll.com/
but they're pretty darn expensive. They sell them at the Men's Wearhouse. They didn't have the rolling one in stock (they said it costs $199), but they had the small one ($99). It's the only garment bag I've looked at so far that I thought had a sensible design. But it was still a little on the small side. (And the strap length was kind of awkward for me, I could see it falling off of my shoulder non-stop...) But if it had been like $50 I would have bought it.
I guess part of my issue is I'm going on a 4-week trip so would like to be able to pack as much into my luggage as possible.
(I did look at the "little" ones at Target, too, but thought I wouldn't fit a whole lot into them & wasn't sure if I'd be able to fit everything else I want to take into a single checked suitcase.) (NO WAY am I paying to check *2* suitcases!)
(Question about the Target one: Does it hurt your shoulder to carry it when it's full?)