I have the first gen of the IT luggage - had it for 5 years I think. I got the set on sale and I carryon only about half the time and check about half the time - so I use the 24 in when I check and it gets checked 5-8 times a year probably. Mostly multi-leg flights. It has held up really well. Wheels , and zippers are like new. The handle is a little sticky now - I have to tug it up. I haven't been kind to it - dragged it up stairs, thrown in trains, car boots etc. And i just couldn't go back to a heavy suitcase after the under 5lbs. I also have a lipault (this bag hoarding is a mental disorder) which is way nicer looking and only a bit heavier, but it is more "frameless" so it is harder to stack things on top if you want to piggyback.

So I got the IT second gen on sale. It is smaller (22-23 vs 24 high, not including handles and wheels and 8 vs 10 wide Also a little narrower). This one does look flimsy and the zippers are sticky, so the build quality is really different. Not in a good way. I am going to give it a try in march, which is the next time I will be checking a bag.

But if I am checking, one of the reasons is that I want some room. I am not getting that much more room from a 20-21" (sometimes 22") carry on that would fit in a trans atlantic flight to justify the hassle of checking. It doesn't really look like it will hold up. I will keep you posted, but it looks like a thumbs down, and it is a shame because they were reasonably priced and lighter that some suitcases without wheels.