If you are looking for a very light case, this might be the best. It has a double locker instead of a zipper, so you may either carry-on or check it.
If you are looking for a real hard side and very resistant case, try something else: this one is so flexible (despite not as much as a Delsey Helium) and, if you check it in, perhaps you will have problems, both with the case and with its contents. If this is your case, you should better choose a Delsey Meridian Plus (same size, far more harder).
Some other comments:
1. The 4-wheel system helps a lot;
2. The lack of a lateral handle sucks;
3. This thing has a strange feature: instead of opening by the side, as most cases do, it opens by the top. It is weird and more difficult to close.
All considered, it is reasonable for its price. I'd say it deserves 5 stars for the first case (when the weight matters) and 3 stars for the second (when the hardness counts). On average, a 4-stars product.