Bought a set similar to this from Studio thinking it was a bargain. Used largest one for one holiday abroad and zip broke off. (annoyed) Have used medium size but to be honest better to invest in something a bit better quality such as the IT lightweight - grandson used it for trip to China and I've used it for Spain. True saying you get what you pay for! :D
Friend had this. 2 of the cases fell apart after the first use.
What are you expecting for that price?
Studio now say they want 35 quid for it. ugly bit of kit. I'd bite at a fiver for the lot.