I recently bought this suitcase for a 2-week vacation on which I could only take carry-on luggage. At first, I wasn't sure whether this would work out, but this little wonder is absolutely amazing for this purpose.
I could easily fit in the following: 2 pairs of jeans, 3 hoodies, 8 shirts, 1 dress, underwear, a pyjama, 2 books (200 pages each) and 1 scarf. As it is expandable by approximately the size of 2 hoodies, not too much (I reckon it would still fit into most carry-on restrictions), you can pack even more.
Now, I feared that the handle would be cheap and the wheels would be terrible. But this is definitely not the case. It's easy to pull out the handle, it seems very sturdy and the wheels are happy to be wheeled around in every direction even with the weight on them. It doesn't fall over when standing, like other small suitcases often do. It's really useful!
What I would have liked is an outside pocket for plane tickets etc., but the suitcase doesn't have that. However, it does have a zip pocket on the inside of the upper shell. So you can just zip it open and get your stuff out quickly.
The zips are also of good quality and don't get stuck or anything.
I chose the purple design with white polka dots, and the dots are larger than on the photo, there's like 5-6 dots on the front. I still think it's really cute, and for those of you who don't like purple, there are plenty of other choices.
All in all, I would totally recommend this to a friend! :)