Used this set on a trip to Europe and survived.
24" luggage looks almost like new
28" luggage returned bent in corners, so I used a round piece of metal to press and force it back to (almost) original shape
20" this thing was with me at all times and around mid trip the handle was not expanding right but by mistake someone knocked my luggage hard on the side with the handle and behold - it is working again but not sure it won't happen again (this is the reason for 4 stars).
keep in mind that luggages are not expandable
they seem flimsy but in reality they hold really good
I assume that zippers may be the weakest link
good bye!