I bought this for my daughter for a trip to the US last week when I thought that it would be a great way to have a booster seat for taxis etc. It worked wonderfully well in that respect and held enough to keep her occupied during the flight. She loved it. However, as with other reviewers, the shoulder strap frayed and broke away from the base within about 5 minutes of carrying it. At that point it was only holding a drawing pad and some pencils so was not overfilled.
It's a great product and I would be happy to buy it again, but only once this issue has been addressed.
EDIT: Just to add, within 48 hours of contacting Trunki, i was holding a replacement cover (the cover comes off the hard shell). It has yet to be tested but Trunki's customer service is spot on, fast, helpful and very pleasant to deal with.